History Monster / CSIVerse

* "[[Recap/CSIS7E15LawOfGravity Law of Gravity]]": [[DirtyCop Frank McCarthy]] is a figure from Michael Keppler's past. The father of Amy, Michael's childhood sweetheart, Frank [[ParentalIncest raped his own daughter]], leading to her [[DrivenToSuicide suicide]], then [[FrameUp pinned it on an innocent man]], convincing Keppler to kill him. Frank later covered up the murders committed by Dennis Graves, and personally murdered a drug dealer. When Graves is found out, Frank kills him and a prostitute he was with to cover up his involvement. When he learns a witness was in the room, Frank attempts to kill her, only to fatally shoot [[TakingTheBullet Michael]] and attempt to kill Catherine Willows.

* "[[Recap/CSIS14E9CheckInAndCheckOut Check In and Check Out]]": [[ThePeepingTom Trent Reager]] is a voyeuristic motel owner who [[FromNobodyToNightmare graduates]] to full-on [[SerialKiller murderer]] due to his love of watching people. Spying on the people who check into his motel, Trent decides to spice things up by applying an LSD hallucinogen spray canister and dowsing his customers in room 114, causing them to go wild and violent, leading to a young man stabbing himself to death; a loving husband beating his wife to death; a homeless man stabbing a kindly couple to death though a hundred knife wounds each; and a teacher gutting her student. Completely proud of his crimes that have led to innocent people being jailed, Trent stands as one of the most unique and horrific killers in all of ''CSI''.

* "[[Recap/ColdCaseS4E22Cargo Cargo]]": "[[TheDreaded Nachalnik]]"--Russian for "[[TheQueenpin Boss]]"--is a mysterious, powerful crime lord and [[HumanTraffickers human trafficker]] operating on the East Coast of the U.S. "Nachalnik" is secretly a seemingly mild-mannered woman named Linda Boyka who uses her position as the head of a community center to prevent her victims from escaping. Boyka is responsible for the systematic kidnapping of [[WouldHurtAChild young girls]] in Eastern Europe and transporting them to the States where they're forced into prostitution. Boyka is so utterly ruthless that even her own men are terrified of her, as they know death awaits them if they fail her. To keep her victims in line, Boyka [[CigaretteBurns burns cigarettes]] into the soles of her victims' feet to break them into submissive slaves, and her treatment of these girls is so horrific that one has died as a result. In 2005, when Mike Chulaski tries to save one of her teenage victims, Boyka threatens to murder Mike and enslaves the girl as a prostitute.

* "[[Recap/ColdCaseS5E15TheRoad The Road]]": "[[TheyLookJustLikeEveryoneElse John Smith]]", real name unknown, is a depraved SerialKiller whose motivations amount to amusing himself. Disturbed since childhood, Smith once witnessed a woman drowning and didn't help her, getting off on the feeling off seeing someone lose all hope and die and sets about replicating it. Posing as a videographer to attract victims, Smith lures in women with happy lives and something to live for be it their family, a wedding or their religion and then kidnaps them before locking them in special cellars. Smith then [[MindRape psychologically torments them]] until [[DespairEventHorizon they finally break and give up hope]], whereupon he [[BuriedAlive fully seals the cellars]] and leaves them to starve to death.

[[AC:''CSI'' Series]]

* ''Series/{{CSI}}'':
** "[[Recap/CSIS2E22CrossJurisdictions Cross Jurisdictions]]": [[SerialKiller Gordon Daimler]], aka [[SerialRapist Adam van der Welk]], is a limo driver who targets wealthy couples. He kills the husbands first and then, after 48 hours of "fun and games", kills the wives. Having already done this with 3 previous couples, his latest target was the former Las Vegas Chief of Detectives; he then took the wife and the Chief's young daughter to [[Series/CSIMiami Miami]], where he kills the wife; the daughter manages to escape, despite Daimler [[WouldHurtAChild trying to shoot her]]. He rapes and kills a fifth woman, and unsuccessfully attempts to kill her husband.
** "[[Recap/CSIS4E1AssumeNothing Assume Nothing]]": Mandy and Cameron Klinefeld put the "unholy" back in UnholyMatrimony. A married couple united by a shared sexual fetish for rape and murder, the pair operate by abducting other husbands and wives, sexually torturing the women while [[ForcedToWatch making the men watch]], with the ultimate goal of forcing them to MercyKill the women they love. They promise the husbands they can go free if they do this, but [[ILied they're lying]].
** "[[Recap/CSIS6E15PiratesOfTheThirdReich Pirates of the Third Reich]]": [[MadDoctor Leon Sneller]] rejected his Jewish upbringing in favor of Nazism, and set out to continue the work of UsefulNotes/JosefMengele. Taking his own twin brother captive, Sneller experiments on and eventually kills him, afterward [[KillAndReplace stealing his identity]] so that he can use his job at a sleep clinic to find subjects for his experiments, which he conducts in a secret laboratory modeled after [[PoWCamp Auschwitz]]. Sneller mutilates or murders 21 people, and treats the victims like death camp prisoners, keeping them shackled while he shaves, brands, and starves them; Sneller's atrocities include crudely sewing two brothers together to create artificial conjoined twins; injecting people with flesh-eating bacteria; and lobotomizing a man and taking one of his eyes, which he tries to transplant into Lady Heather's heterochromatic daughter, Zoe, who gnaws her own hand off in a failed bid to escape from Sneller's TortureCellar.
** "[[Recap/CSIS7E15LawOfGravity Law of Gravity]]": [[DirtyCop Frank McCarthy]] is a figure from Michael Keppler's past. The father of Amy, Michael's childhood sweetheart, Frank [[ParentalIncest raped his own daughter]], leading to her [[DrivenToSuicide suicide]], then [[FrameUp pinned it on an innocent man]], convincing Keppler to kill him. Frank later covered up the murders committed by Dennis Graves, and personally murdered a drug dealer. When Graves is found out, Frank kills him and a prostitute he was with to cover up his involvement. When he learns a witness was in the room, Frank attempts to kill her, only to fatally shoot [[TakingTheBullet Michael]] and attempt to kill Catherine Willows.
** "[[Recap/CSIS12E3Bittersweet Bittersweet]]": [[ManipulativeBitch Gina Sinclair]] is a [[WouldHurtAChild pedophilic]] master manipulator who had her weak-willed husband, Todd, help her rape, torture, and murder five little girls, with the only survivor of the killing spree being Colleen Hughes, who was held prisoner for three years by the Sinclairs. The couple would film themselves abusing their victims, who Gina enjoyed violating with beer bottles while being watched by Todd. When they were caught, Gina got a lenient sentence by convincing the jury that she was [[WoundedGazelleGambit abused and enslaved by Todd]]. After being paroled, an unrepentant Gina coerces a man named Ryan Thomas and [[UsefulNotes/StockholmSyndrome the brainwashed Colleen]] into assisting her with the rape, torture, and murder of thirteen-year-old Samantha Chase.
** "[[Recap/CSIS12E9Zippered Zippered]]", "[[Recap/CSIS12E11MsWillowsRegrets Ms. Willows Regrets]]", & "[[Recap/CSIS12E12WillowsInTheWind Willows in the Wind]]": [[ArcVillain Laura Gabriel]] is a ruthless arms smuggler and supposed friend to Catherine Willows. Playing a meek and submissive wife to her sleazy private military firm head husband [[CorruptCorporateExecutive Mark]], she uses this false personality to deflect blame off her and onto him as she [[ArmsDealer funnels his company's weapons to the Mafia and the cartels]]. When the investigation starts getting too close to the truth, she hires employees of the company to murder her own lawyer and all of his staff; following this, [[YouHaveOutlivedYourUsefulness she kills the assassins]] and burns their bodies beyond recognition in order to [[FakingTheDead fake her own death]] and that of her right-hand man. She intended for an enraged Catherine to summarily execute her husband, and placed a contract on Catherine herself to clean up the last remaining loose end, not caring for her old friend in the slightest.
** "[[Recap/CSIS13E8CSIOnfire CSI on Fire]]": [[SerialRapist Tom Cooley]] led the gang-rape on Marla Louie before attempting to kill her by [[BuriedAlive burying her alive]]. He would later go on to rape eight more women before [[SerialKiller strangling them]] and dumping the corpses under his family's ranch. He would also kill his cohort, Max Liston, in a [[MakeItLookLikeAnAccident scuba-diving accident]], and it's implied he was planning to kill his lawyer Gavin Pearson before Pearson managed to kill Cooley first.
** "[[Recap/CSIS14E9CheckInAndCheckOut Check In and Check Out]]": [[ThePeepingTom Trent Reager]] is a voyeuristic motel owner who [[FromNobodyToNightmare graduates]] to full-on [[SerialKiller murderer]] due to his love of watching people. Spying on the people who check into his motel, Trent decides to spice things up by applying an LSD hallucinogen spray canister and dowsing his customers in room 114, causing them to go wild and violent, leading to a young man stabbing himself to death; a loving husband beating his wife to death; a homeless man stabbing a kindly couple to death though a hundred knife wounds each; and a teacher gutting her student. Completely proud of his crimes that have led to innocent people being jailed, Trent stands as one of the most unique and horrific killers in all of ''CSI''.
* ''Series/CSIMiami'':
** "Broken" & "Body Count": [[WouldHurtAChild Stewart Otis]] is a pedophilic SerialKiller and SerialRapist who targeted little girls around the ages of five to eight years. While acting as an authority figure, he would kidnap the girls to take to his home for him to rape and strangle to death before burying the bodies in is backyard. He has done this to eight little girls and only laments his latest victim, Ruthie, because she died before he got a chance to "play" with her. In a later appearance, he escapes prison with the help of two fellow inmates, Hank Kerner and Randall Kaye. He then [[UngratefulBastard returns the latter's favor]] by kidnapping his daughter, Emma, taking her to a cabin where he not only raped her, but force her to partake in a [[SnuffFilm film]] taunting Horatio Caine, the person who arrested him. He then tries to kill her before trying to find her cousin, Robyn, hoping to do the same thing to her.
** "Tinder Box": [[GloryHound Danny Maxwell]], the bouncer at "Club Descent", resorts to [[EngineeredHeroics unethical means]] to make himself into a hero. Having doused curtains with rum so that the pyrotechnics would light them on fire, Danny intends to [[HeroicFireRescue engineer a rescue of the patrons from the inferno]], killing a bartender who witnesses him and attempting to [[DeceasedFallGuyGambit frame him]]. As a result of Danny's actions, over a dozen people die and several more are injured, notably a woman being trampled and another woman injuring herself in a shower as a result of smoke inhalation. Eventually confronted by [=CSIs=] Eric Delko and Tim "Speed" Speedle, Danny [[MotiveRant tries to justify his actions by saying he wanted to be a hero]], much to the disappointment of his former friend Delko.
** "Rampage" through "Rio": [[ArcVillain Antonio Riaz]] is the head of [[TheCartel the Mala Noche]] and Horatio Caine's ArchEnemy. In his first appearance, Riaz helps shoot up a courtroom to free one of his associates to help him with a business deal and later gains an enmity with Horatio, which he acts on by [[AndYourLittleDogToo killing Horatio's wife Marisol]]--who is also Eric Delko's sister. Upon his return, Riaz has a crime scene rigged with a grenade to kill one of Horatio's team to spite him and later attempts to blow up a plane filled with hundreds as a big show before being captured. Using [[ScrewTheRulesIHaveConnections his connections]] to free himself, when he returns, to continue his feud, he forces Horatio's brother and nephew to be involved in his drug business, before having Horatio's brother killed and forcing Horatio's nephew to smuggle in heroin pellets into the US, along with other teenage boys forcefully recruited by Riaz--some of whom die as a result of the trade--all while keeping the nephew's father's life over the boy's head when in reality the father is already dead.
** "All Fall Down" & "Fallen": [[EvilTeacher Professor Robert "Bob" Starling]], when denied tenure on account of his student--and mistress--Melissa Walls's faked thesis, [[DisproportionateRetribution retaliates by killing]] Miami-Dade University personnel he sees as [[NeverMyFault having interfered with his career]]. To this end, Starling shoots one victim with a remote-controlled rifle, drowns another under a pool cover, and attempts to burn the third one alive with a compound of potassium and water as a result of the victim using fake cologne. In order to suppress evidence against him, Bob [[ManipulativeBastard manipulates]] Melissa into releasing [[DeadlyGas halon gas]] in an attempt to suffocate dozens of CSI lab workers, successfully having CSI Jesse Cardoza killed.
** "Hunting Ground": [[EgomaniacHunter Wesley Habeck]] is the founder of an underground club dedicated to HuntingTheMostDangerousGame. After buying undocumented male immigrants from a smuggler, Habeck holds the men captive for a time, during which he treats them like animals, keeping them chained up and wallowing in their own filth while he [[SlaveBrand brands]] them and pumps them full of steroids, ensuring that they remain compliant by threatening to kill any loved ones that they took with them from the Caribbean. When the time comes, Habeck and one or two of the people who have bought their way into his organization hunt the men through the Everglades. When he realizes that the authorities are closing in on him, Habeck sends a pair of club members out to hunt his remaining two captives, then [[DirtyCoward drives off and leaves them in the middle of nowhere as he prepares to flee Miami]].
** "Crowned": [[SerialRapist Edwin Chambers]] is a pageant director who arranges beauty pageants to lure [[WouldHurtAChild young girls]] before abducting them and taking them to an abandoned movie theater where he then proceeds to [[RapeIsASpecialKindOfEvil rape]] them, already raping countless girls, including Jan Gramercy when she was young. He later kidnaps Tori Haverford, and [[AttemptedRape tries to rape her]] before attempting to kill her when he gets cornered by Horatio and Natalia.
* ''Series/{{CSINY}}'':
** "[[Recap/CSINYS04E05 Down the Rabbit Hole]]" & "[[Recap/CSINYS04E15 DOA for a Day]]": "[[TheSpook Suspect X]]" is an enigmatic [[PsychoForHire assassin who takes pleasure in profiting off of murder]], using a "recursive spider" to find keywords that lead her to potential clients. Having [[KillAndReplace tortured and murdered a woman to obtain her virtual avatar "Venus"]], X intends on using Venus as a means of reaching her target, a New York Congressman. Under the threat of exposure from Venus's online paramour "Don Juan 2-3", X kills him to silence him. Confronted online by NYPD Detective Mac Taylor, X lures Mac's avatar into a [[PastVictimShowcase virtual gallery containing dozens of her past targets]], then has the Crime Lab's computers infected with a virus. Upon resurfacing, X captures a similar looking woman--[[SurgicalImpersonation subjecting her captive to torture and inhumane conditions while having a disgraced plastic surgeon client-turned-accomplice perform plastic surgery on her]]--subsequently murdering her to fake her own death. After antagonizing the NYPD once she realizes they are on her trail, and murdering the surgeon once he is exposed, X is discovered to have posed as an audio technician in order to set up a city official's assassination.
** "[[Recap/CSINYS05E14 She's Not There]]": [[BitchInSheepsClothing Carolyn Williams]] is a leader in a HumanTrafficking ring. Carolyn lures in girls from around the world who are aged 14-21 and [[ModelScam promises them jobs as models]]. Carolyn [[FalseFriend befriends them]] and brings them to a party where she and her partner drug and then kidnap them. They then take them to a warehouse where the girls are beaten and drugged into submission using heroin. They are then [[SexSlave forced into prostitution]] for money, with this operation having run for years and with an estimated victim count in the dozens.
** "[[Recap/CSINYS07E13 Party Down]]": [[TheyLookJustLikeEveryoneElse Neal Cooper]] is a seemingly unimposing young man who [[NeverMyFault blames others]] for his feelings of isolation. To this end, Neal sets up [[NastyParty a party for at least 20 people on a truck where he plans on killing the attendees]]--including four people he specifically invited from his past--having hot-wired the truck, padlocked the rear entry, and welded the emergency exit shut. While the party is going on, Neal [[TrappedInASinkingCar commandeers the truck into the Hudson River so it can sink]]. Rescued by an intended victim when he is himself trapped, Neal [[UngratefulBastard kills his rescuer]] when he realizes the latter can finger him as the perpetrator. Subsequently, Neal hides among the survivors to throw suspicion off of himself. Even when confronted by NYPD Detectives Mac Taylor and Jo Danville with the evidence against him, Neal refuses to take responsibility for his actions.
* ''Series/CSICyber'''s "Python" & "Python's Revenge": [[SnakesAreSinister Python]], real name [[TheCracker Dante Wilkerson]], is one of the world's most wanted hackers. A figure born with reptilian skin, he would run a website where he sells faulty guns and drugs in the hope of creating [[ForTheEvulz anarchy]]. When cornered by the authorities, he would brutally torture and kill any agents sent against him. He would also hack various government agencies and release the information to criminals. Becoming obsessed with Agent Avery Ryan, he would kidnap, torture and even, just to mess with her, would give drugs to Avery's friend. About to be captured, he threatened to use his tech skills to overdose the friend if they don’t [[CriminalMindGames solve his riddles]], but later [[ILied attempts to kill her anyway]]. After failing, he tracks Avery down and kills the agents guarding her in the sick hope that if she kills him, she would become just like him. Python mixes cold sociopathy and vindictiveness and stands out as one of the most wicked of the franchise has ever produced.
* {{Crossover}}s:
** ''Series/CSIMiami''[='s=] "Felony Flight" & ''Series/{{CSINY}}'''s "[[Recap/CSINYS02E07 Manhattan Manhunt]]": [[BastardBastard Henry Darius]] is a SerialKiller-turned-SpreeKiller known for shooting his victims in the head. As a child born from a mistress of a wealthy family, he always felt [[DrivenByEnvy jealous that his half-sisters got more attention than he did]], and as a result, became a murderer, with his first three victims [[ReplacementGoldfish looking like his sisters]]. In his first appearance, he causes a plane crash that kills two pilots and one U.S. Marshal. He then steals the marshal's gun and uses it to kill four college students and steal their car. He then travels to Miami University where he would kill two more college students after they told him about his half-sister, Alexa, and her whereabouts. He then goes to her location and kidnap her before shooting a man for his car and heading to New York City. When he arrives in New York, he murders Alexa along with six college students, before heading off to kill his second half-sister Sarah. A narcissistic sociopath, with a violently-low impulse control, [[FreudianExcuseIsNoExcuse an excuse that doesn't come close to justifying his actions]], and 20 body count to boot, Henry Darius was among the worst that both CSI teams from Miami and New York had ever had to face.
** ''CSI: Trilogy'' [[note]]crossover between ''Series/CSIMiami'', ''Series/{{CSINY}}'', and ''Series/{{CSI}}''[[/note]]: These three represent the worst that [[HumanTrafficking the Zetas]] have to offer:
*** Part 1 (''Series/CSIMiami''[='s=] "Bone Voyage"): [[StarterVillain Jimmy Burris]] is a pimp who tricks numerous women throughout Miami into working for him by [[ModelScam posing as a recruiter for a model agency]], where he would then have them [[SexSlave forced into prostitution]], even having sex with them himself. When one of his prisoners, Ashley Tanner, tries to escape, Burris tracked her down, planning to dismember her while she's still alive, before dumping her remains in the swamps.
*** Part 2 (''Series/{{CSINY}}''[='s=] "[[Recap/CSINYS06E07 Hammer Down]]"): [[SerialKiller Casey Steele]] transports the abducted women throughout the U.S., where he would harvest the women's [[OrganTheft organs]] by extracting them from their bodies while they are [[AndIMustScream still alive and conscious]], his victims dying in excruciating pain; Debbie Menzel is one such example, with Steele cutting her open to extract her liver before she dies. When he retrieves Madeleine Briggs from Jimmy Burris's liaison, Tyler Goodman, Steele murders Tyler after [[YouHaveOutlivedYourUsefulness he served his purpose]]. After causing a car accident that killed a man, Steele forces an innocent bystander to drive him and his captive away from the car crash and into New York City before shooting him and leaving him to die; he would shoot at several New York [[CopKiller cops]] when he makes his attempts to leave the city.
*** Part 3 (''Series/{{CSI}}''[='s=] "[[Recap/CSIS10E7TheLostGirls The Lost Girls]]"): [[DiabolicalMastermind Dimitri Sadesky]] is a leader of the Zetas and is responsible for arranging for countless women to be kidnapped throughout the U.S., their organs harvested, and them forced into prostitution. In his role [[EvilTeacher as a college professor]], Dimitri exploits his position to lure students into sex work. He's also had them killed whenever they try to escape from their imprisonment, even [[SerialKiller killing four women himself]] after he is done [[ColdBloodedTorture torturing]] them, and he also murdered Samantha Matthews before having a butcher from Miami dismember and dispose of her corpse.

[[AC:''Series/ColdCase'']]

* "[[Recap/ColdCaseS1E8FlyAway Fly Away]]": [[DepartmentOfChildDisservices Josh Freely]] is a brutal [[WouldHurtAChild pedophile]] who uses his position, as a social worker working with emotionally unstable parents, to find new victims, of which he has 8 at the very least. Freely piles emotional abuse onto the parents, making them feel as though they're worthless, so they surrender their kids to him, and if that doesn't work, he's more than happy to fudge his own records so his superiors order the children removed. His abuse eventually reaches the point that one such mother attempts to [[DrivenToSuicide kill herself]] and her young daughter--with the latter dying--rather than [[FateWorseThanDeath let Freely take her]].
* "[[Recap/ColdCaseS5E15TheRoad The Road]]": "[[TheyLookJustLikeEveryoneElse John Smith]]", real name unknown, is a depraved killer whose motivations amount to amusing himself. Disturbed since childhood, Smith once witnessed a woman drowning and didn't help her, getting off on the feeling off seeing someone lose all hope and die and sets about replicating it. Posing as a videographer to attract victims, Smith lures in women with happy lives and something to live for be it their family, a wedding or their religion and then kidnaps them before locking them in special cellars. Smith then [[MindRape psychologically torments them]] until [[DespairEventHorizon they finally break and give up hope]], whereupon he [[BuriedAlive fully seals the cellars]] and leaves them to starve to death.

[[AC:Other Media]]

* ''[[ComicBook/CSIDominos Dominos]]'', written by Kris Oprisko: [[PsychoForHire "Smiley" Tallarico]] is an infamously [[AxCrazy vicious and psychopathic]] Mafia enforcer who is brought to Las Vegas by the Cavellinis. Fearing what Smiley is capable of, the Cavellinis' main rival, Don Vincent Brescia, orders a risky hit on Smiley, but Smiley survives, and proceeds to embark on a RoaringRampageOfRevenge. Smiley tracks down his two would-be assassins, tortures and dismembers one, and bashes in the head of the other before [[BuriedAlive burying him alive]] and going after Brescia. After garroting Brescia, Smiley decides to terrorize the entire city and prove to everyone that he is not a man to be trifled with by systemically eliminating absolutely everyone who has had any kind of recent contact--no matter how minor--with Brescia, starting with the innocent staff of a plastic surgery clinic called Desert Hearts. Smiley brutally murders three random employees of the clinic and nearly kills two others before being taken down by the LVMPD.
* ''[[Literature/Level26DarkOrigins Level 26: Dark Origins]]'', by Anthony Zuiker & Duane Swierczynski: Sqweegel, real name unknown, is the most prolific SerialKiller in history within the CSI world. Sqweegel is known for incredible preparation and his seeming randomness. Once he locks in on a victim, Sqweegel proceeds to murder them, often after [[ColdBloodedTorture torturing]] and [[SerialRapist raping]] them, with [[DepravedBisexual gender being irrelevant to his tastes]]. Sqweegel initiates the book's plot by sending in a homemade {{snuff film}} to the authorities, and proceeds to kidnap three teenagers who tried to illegally tried to buy beer before raping them with himself, a mop handle and a baseball bat. He burns six priests alive and attempts to torture the widows of 9/11 firefighters to death. His true enemy is the investigator Steven Dark, whose foster family was murdered by Sqweegel once Dark came close to catching him years ago. To “punish” Dark for cheating on his wife Sibby, Sqweegel had raped Sibby, possibly conceiving a [[WouldHurtAChild child]] which Sqweegel plans to kill, along with raping and killing Sibby. With a body count numbering in the high hundreds and the belief [[KnightTemplar he is an instrument of divine retribution]], Sqweegel remains the most terrifying enemy of Dark's career, and is the only known serial killer to receive the classification Level 26 to designate a monster that was previously beyond human comprehension.

[[AC:''Series/{{CSI}}'']]

* "[[Recap/CSIS2E22CrossJurisdictions Cross Jurisdictions]]": [[SerialKiller Gordon Daimler]], aka [[SerialRapist Adam van der Welk]], is a limo driver who targets wealthy couples. He kills the husbands first and then, after 48 hours of "fun and games", kills the wives. Having already done this with 3 previous couples, his latest target was the former Las Vegas Chief of Detectives; he then took the wife and the Chief's young daughter to [[Series/CSIMiami Miami]], where he kills the wife; the daughter manages to escape, despite Daimler [[WouldHurtAChild trying to shoot her]]. He rapes and kills a fifth woman, and unsuccessfully attempts to kill her husband.
* "[[Recap/CSIS4E1AssumeNothing Assume Nothing]]": Mandy and Cameron Klinefeld put the "unholy" back in UnholyMatrimony. A married couple united by a shared sexual fetish for rape and murder, the pair operate by abducting other husbands and wives, sexually torturing the women while [[ForcedToWatch making the men watch]], with the ultimate goal of forcing them to MercyKill the women they love. They promise the husbands they can go free if they do this, but [[ILied they're lying]].
* "[[Recap/CSIS6E15PiratesOfTheThirdReich Pirates of the Third Reich]]": [[MadDoctor Leon Sneller]] rejected his Jewish upbringing in favor of Nazism, and set out to continue the work of UsefulNotes/JosefMengele. Taking his own twin brother captive, Sneller experiments on and eventually kills him, afterward [[KillAndReplace stealing his identity]] so that he can use his job at a sleep clinic to find subjects for his experiments, which he conducts in a secret laboratory modeled after [[PoWCamp Auschwitz]]. Sneller mutilates or murders 21 people, and treats the victims like death camp prisoners, keeping them shackled while he shaves, brands, and starves them; Sneller's atrocities include crudely sewing two brothers together to create artificial conjoined twins; injecting people with flesh-eating bacteria; and lobotomizing a man and taking one of his eyes, which he tries to transplant into Lady Heather's heterochromatic daughter, Zoe, who gnaws her own hand off in a failed bid to escape from Sneller's TortureCellar.
* "[[Recap/CSIS12E3Bittersweet Bittersweet]]": [[ManipulativeBitch Gina Sinclair]] is a [[WouldHurtAChild pedophilic]] master manipulator who had her weak-willed husband, Todd, help her rape, torture, and murder five little girls, with the only survivor of the killing spree being Colleen Hughes, who was held prisoner for three years by the Sinclairs. The couple would film themselves abusing their victims, who Gina enjoyed violating with beer bottles while being watched by Todd. When they were caught, Gina got a lenient sentence by convincing the jury that she was [[WoundedGazelleGambit abused and enslaved by Todd]]. After being paroled, an unrepentant Gina coerces a man named Ryan Thomas and [[UsefulNotes/StockholmSyndrome the brainwashed Colleen]] into assisting her with the rape, torture, and murder of thirteen-year-old Samantha Chase.
* "[[Recap/CSIS12E9Zippered Zippered]]", "[[Recap/CSIS12E11MsWillowsRegrets Ms. Willows Regrets]]", & "[[Recap/CSIS12E12WillowsInTheWind Willows in the Wind]]": [[ArcVillain Laura Gabriel]] is a ruthless arms smuggler and supposed friend to Catherine Willows. Playing a meek and submissive wife to her sleazy private military firm head husband [[CorruptCorporateExecutive Mark]], she uses this false personality to deflect blame off her and onto him as she [[ArmsDealer funnels his company's weapons to the Mafia and the cartels]]. When the investigation starts getting too close to the truth, she hires employees of the company to murder her own lawyer and all of his staff; following this, [[YouHaveOutlivedYourUsefulness she kills the assassins]] and burns their bodies beyond recognition in order to [[FakingTheDead fake her own death]] and that of her right-hand man. She intended for an enraged Catherine to summarily execute her husband, and placed a contract on Catherine herself to clean up the last remaining loose end, not caring for her old friend in the slightest.
* "[[Recap/CSIS13E8CSIOnfire CSI on Fire]]": [[SerialRapist Tom Cooley]] led the gang-rape on Marla Louie before attempting to kill her by [[BuriedAlive burying her alive]]. He would later go on to rape eight more women before [[SerialKiller strangling them]] and dumping the corpses under his family's ranch. He would also kill his cohort, Max Liston, in a [[MakeItLookLikeAnAccident scuba-diving accident]], and it's implied he was planning to kill his lawyer Gavin Pearson before Pearson managed to kill Cooley first.
* "[[Recap/CSIS14E9CheckInAndCheckOut Check In and Check Out]]": [[ThePeepingTom Trent Reager]] is a voyeuristic motel owner who [[FromNobodyToNightmare graduates]] to full-on [[SerialKiller murderer]] due to his love of watching people. Spying on the people who check into his motel, Trent decides to spice things up by applying an LSD hallucinogen spray canister and dowsing his customers in room 114, causing them to go wild and violent, leading to a young man stabbing himself to death; a loving husband beating his wife to death; a homeless man stabbing a kindly couple to death though a hundred knife wounds each; and a teacher gutting her student. Completely proud of his crimes that have led to innocent people being jailed, Trent stands as one of the most unique and horrific killers in all of ''CSI''.

[[AC:''Series/CSIMiami'']]

* "Broken" & "Body Count": [[WouldHurtAChild Stewart Otis]] is a pedophilic SerialKiller and SerialRapist who targeted little girls around the ages of five to eight years. While acting as an authority figure, he would kidnap the girls to take to his home for him to rape and strangle to death before burying the bodies in is backyard. He has done this to eight little girls and only laments his latest victim, Ruthie, because she died before he got a chance to "play" with her. In a later appearance, he escapes prison with the help of two fellow inmates, Hank Kerner and Randall Kaye. He then [[UngratefulBastard returns the latter's favor]] by kidnapping his daughter, Emma, taking her to a cabin where he not only raped her, but force her to partake in a [[SnuffFilm film]] taunting Horatio Caine, the person who arrested him. He then tries to kill her before trying to find her cousin, Robyn, hoping to do the same thing to her.
* "Tinder Box": [[GloryHound Danny Maxwell]], the bouncer at "Club Descent", resorts to [[EngineeredHeroics unethical means]] to make himself into a hero. Having doused curtains with rum so that the pyrotechnics would light them on fire, Danny intends to [[HeroicFireRescue engineer a rescue of the patrons from the inferno]], killing a bartender who witnesses him and attempting to [[DeceasedFallGuyGambit frame him]]. As a result of Danny's actions, over a dozen people die and several more are injured, notably a woman being trampled and another woman injuring herself in a shower as a result of smoke inhalation. Eventually confronted by [=CSIs=] Eric Delko and Tim "Speed" Speedle, Danny [[MotiveRant tries to justify his actions by saying he wanted to be a hero]], much to the disappointment of his former friend Delko.
* "Rampage" through "Rio": [[ArcVillain Antonio Riaz]] is the head of [[TheCartel the Mala Noche]] and Horatio Caine's ArchEnemy. In his first appearance, Riaz helps shoot up a courtroom to free one of his associates to help him with a business deal and later gains an enmity with Horatio, which he acts on by [[AndYourLittleDogToo killing Horatio's wife Marisol]]--who is also Eric Delko's sister. Upon his return, Riaz has a crime scene rigged with a grenade to kill one of Horatio's team to spite him and later attempts to blow up a plane filled with hundreds as a big show before being captured. Using [[ScrewTheRulesIHaveConnections his connections]] to free himself, when he returns, to continue his feud, he forces Horatio's brother and nephew to be involved in his drug business, before having Horatio's brother killed and forcing Horatio's nephew to smuggle in heroin pellets into the US, along with other teenage boys forcefully recruited by Riaz--some of whom die as a result of the trade--all while keeping the nephew's father's life over the boy's head when in reality the father is already dead.
* "All Fall Down" & "Fallen": [[EvilTeacher Professor Robert "Bob" Starling]], when denied tenure on account of his student--and mistress--Melissa Walls's faked thesis, [[DisproportionateRetribution retaliates by killing]] Miami-Dade University personnel he sees as [[NeverMyFault having interfered with his career]]. To this end, Starling shoots one victim with a remote-controlled rifle, drowns another under a pool cover, and attempts to burn the third one alive with a compound of potassium and water as a result of the victim using fake cologne. In order to suppress evidence against him, Bob [[ManipulativeBastard manipulates]] Melissa into releasing [[DeadlyGas halon gas]] in an attempt to suffocate dozens of CSI lab workers, successfully having CSI Jesse Cardoza killed.
* "Hunting Ground": [[EgomaniacHunter Wesley Habeck]] is the founder of an underground club dedicated to HuntingTheMostDangerousGame. After buying undocumented male immigrants from a smuggler, Habeck holds the men captive for a time, during which he treats them like animals, keeping them chained up and wallowing in their own filth while he [[SlaveBrand brands]] them and pumps them full of steroids, ensuring that they remain compliant by threatening to kill any loved ones that they took with them from the Caribbean. When the time comes, Habeck and one or two of the people who have bought their way into his organization hunt the men through the Everglades. When he realizes that the authorities are closing in on him, Habeck sends a pair of club members out to hunt his remaining two captives, then [[DirtyCoward drives off and leaves them in the middle of nowhere as he prepares to flee Miami]].
* "Crowned": [[SerialRapist Edwin Chambers]] is a pageant director who arranges beauty pageants to lure [[WouldHurtAChild young girls]] before abducting them and taking them to an abandoned movie theater where he then proceeds to [[RapeIsASpecialKindOfEvil rape]] them, already raping countless girls, including Jan Gramercy when she was young. He later kidnaps Tori Haverford, and [[AttemptedRape tries to rape her]] before attempting to kill her when he gets cornered by Horatio and Natalia.

[[AC:''Series/{{CSINY}}'']]

* "[[Recap/CSINYS04E05 Down the Rabbit Hole]]" & "[[Recap/CSINYS04E15 DOA for a Day]]": "[[TheSpook Suspect X]]" is an enigmatic [[PsychoForHire assassin who takes pleasure in profiting off of murder]], using a "recursive spider" to find keywords that lead her to potential clients. Having [[KillAndReplace tortured and murdered a woman to obtain her virtual avatar "Venus"]], X intends on using Venus as a means of reaching her target, a New York Congressman. Under the threat of exposure from Venus's online paramour "Don Juan 2-3", X kills him to silence him. Confronted online by NYPD Detective Mac Taylor, X lures Mac's avatar into a [[PastVictimShowcase virtual gallery containing dozens of her past targets]], then has the Crime Lab's computers infected with a virus. Upon resurfacing, X captures a similar looking woman--[[SurgicalImpersonation subjecting her captive to torture and inhumane conditions while having a disgraced plastic surgeon client-turned-accomplice perform plastic surgery on her]]--subsequently murdering her to fake her own death. After antagonizing the NYPD once she realizes they are on her trail, and murdering the surgeon once he is exposed, X is discovered to have posed as an audio technician in order to set up a city official's assassination.
* "[[Recap/CSINYS05E14 She's Not There]]": [[BitchInSheepsClothing Carolyn Williams]] is a leader in a HumanTrafficking ring. Carolyn lures in girls from around the world who are aged 14-21 and [[ModelScam promises them jobs as models]]. Carolyn [[FalseFriend befriends them]] and brings them to a party where she and her partner drug and then kidnap them. They then take them to a warehouse where the girls are beaten and drugged into submission using heroin. They are then [[SexSlave forced into prostitution]] for money, with this operation having run for years and with an estimated victim count in the dozens.
* "[[Recap/CSINYS07E13 Party Down]]": [[TheyLookJustLikeEveryoneElse Neal Cooper]] is a seemingly unimposing young man who [[NeverMyFault blames others]] for his feelings of isolation. To this end, Neal sets up [[NastyParty a party for at least 20 people on a truck where he plans on killing the attendees]]--including four people he specifically invited from his past--having hot-wired the truck, padlocked the rear entry, and welded the emergency exit shut. While the party is going on, Neal [[TrappedInASinkingCar commandeers the truck into the Hudson River so it can sink]]. Rescued by an intended victim when he is himself trapped, Neal [[UngratefulBastard kills his rescuer]] when he realizes the latter can finger him as the perpetrator. Subsequently, Neal hides among the survivors to throw suspicion off of himself. Even when confronted by NYPD Detectives Mac Taylor and Jo Danville with the evidence against him, Neal refuses to take responsibility for his actions.

[[AC:''Series/CSICyber'']]
* "Python" & "Python's Revenge": [[SnakesAreSinister Python]], real name [[TheCracker Dante Wilkerson]], is one of the world's most wanted hackers. A figure born with reptilian skin, he would run a website where he sells faulty guns and drugs in the hope of creating [[ForTheEvulz anarchy]]. When cornered by the authorities, he would brutally torture and kill any agents sent against him. He would also hack various government agencies and release the information to criminals. Becoming obsessed with Agent Avery Ryan, he would kidnap, torture and even, just to mess with her, would give drugs to Avery's friend. About to be captured, he threatened to use his tech skills to overdose the friend if they don’t [[CriminalMindGames solve his riddles]], but later [[ILied attempts to kill her anyway]]. After failing, he tracks Avery down and kills the agents guarding her in the sick hope that if she kills him, she would become just like him. Python mixes cold sociopathy and vindictiveness and stands out as one of the most wicked of the franchise has ever produced.

[[AC:''Series/ColdCase'']]
[[folder:Examples]]
* "[[Recap/ColdCaseS1E8FlyAway Fly Away]]": [[DepartmentOfChildDisservices Josh Freely]] is a brutal [[WouldHurtAChild pedophile]] who uses his position, as a social worker working with emotionally unstable parents, to find new victims, of which he has 8 at the very least. Freely piles emotional abuse onto the parents, making them feel as though they're worthless, so they surrender their kids to him, and if that doesn't work, he's more than happy to fudge his own records so his superiors order the children removed. His abuse eventually reaches the point that one such mother attempts to [[DrivenToSuicide kill herself]] and her young daughter--with the latter dying--rather than [[FateWorseThanDeath let Freely take her]].
* "[[Recap/ColdCaseS5E15TheRoad The Road]]": "[[TheyLookJustLikeEveryoneElse John Smith]]", real name unknown, is a depraved killer whose motivations amount to amusing himself. Disturbed since childhood, Smith once witnessed a woman drowning and didn't help her, getting off on the feeling off seeing someone lose all hope and die and sets about replicating it. Posing as a videographer to attract victims, Smith lures in women with happy lives and something to live for be it their family, a wedding or their religion and then kidnaps them before locking them in special cellars. Smith then [[MindRape psychologically torments them]] until [[DespairEventHorizon they finally break and give up hope]], whereupon he [[BuriedAlive fully seals the cellars]] and leaves them to starve to death.
[[/folder]]

[[AC:{{Crossover}}s]]
[[folder:Examples]]
* ''Series/CSIMiami''[='s=] "Felony Flight" & ''Series/{{CSINY}}'''s "[[Recap/CSINYS02E07 Manhattan Manhunt]]": [[BastardBastard Henry Darius]] is a SerialKiller-turned-SpreeKiller known for shooting his victims in the head. As a child born from a mistress of a wealthy family, he always felt [[DrivenByEnvy jealous that his half-sisters got more attention than he did]], and as a result, became a murderer, with his first three victims [[ReplacementGoldfish looking like his sisters]]. In his first appearance, he causes a plane crash that kills two pilots and one U.S. Marshal. He then steals the marshal's gun and uses it to kill four college students and steal their car. He then travels to Miami University where he would kill two more college students after they told him about his half-sister, Alexa, and her whereabouts. He then goes to her location and kidnap her before shooting a man for his car and heading to New York City. When he arrives in New York, he murders Alexa along with six college students, before heading off to kill his second half-sister Sarah. A narcissistic sociopath, with a violently-low impulse control, [[FreudianExcuseIsNoExcuse an excuse that doesn't come close to justifying his actions]], and 20 body count to boot, Henry Darius was among the worst that both CSI teams from Miami and New York had ever had to face.
* ''CSI: Trilogy'' [[note]]crossover between ''Series/CSIMiami'', ''Series/{{CSINY}}'', and ''Series/{{CSI}}''[[/note]]: These three represent the worst that [[HumanTrafficking the Zetas]] have to offer:
** Part 1 (''Series/CSIMiami''[='s=] "Bone Voyage"): [[StarterVillain Jimmy Burris]] is a pimp who tricks numerous women throughout Miami into working for him by [[ModelScam posing as a recruiter for a model agency]], where he would then have them [[SexSlave forced into prostitution]], even having sex with them himself. When one of his prisoners, Ashley Tanner, tries to escape, Burris tracked her down, planning to dismember her while she's still alive, before dumping her remains in the swamps.
** Part 2 (''Series/{{CSINY}}''[='s=] "[[Recap/CSINYS06E07 Hammer Down]]"): [[SerialKiller Casey Steele]] transports the abducted women throughout the U.S., where he would harvest the women's [[OrganTheft organs]] by extracting them from their bodies while they are [[AndIMustScream still alive and conscious]], his victims dying in excruciating pain; Debbie Menzel is one such example, with Steele cutting her open to extract her liver before she dies. When he retrieves Madeleine Briggs from Jimmy Burris's liaison, Tyler Goodman, Steele murders Tyler after [[YouHaveOutlivedYourUsefulness he served his purpose]]. After causing a car accident that killed a man, Steele forces an innocent bystander to drive him and his captive away from the car crash and into New York City before shooting him and leaving him to die; he would shoot at several New York [[CopKiller cops]] when he makes his attempts to leave the city.
** Part 3 (''Series/{{CSI}}''[='s=] "[[Recap/CSIS10E7TheLostGirls The Lost Girls]]"): [[DiabolicalMastermind Dimitri Sadesky]] is a leader of the Zetas and is responsible for arranging for countless women to be kidnapped throughout the U.S., their organs harvested, and them forced into prostitution. In his role [[EvilTeacher as a college professor]], Dimitri exploits his position to lure students into sex work. He's also had them killed whenever they try to escape from their imprisonment, even [[SerialKiller killing four women himself]] after he is done [[ColdBloodedTorture torturing]] them, and he also murdered Samantha Matthews before having a butcher from Miami dismember and dispose of her corpse.
[[/folder]]

[[AC:Other Media]]
[[folder:Examples]]
* ''[[ComicBook/CSIDominos Dominos]]'' comic, by Kris Oprisko & Gabriel Rodriguez: [[PsychoForHire "Smiley" Tallarico]] is an infamously [[AxCrazy vicious and psychopathic]] Mafia enforcer who is brought to Las Vegas by the Cavellinis. Fearing what Smiley is capable of, the Cavellinis' main rival, Don Vincent Brescia, orders a risky hit on Smiley, but Smiley survives, and proceeds to embark on a RoaringRampageOfRevenge. Smiley tracks down his two would-be assassins, tortures and dismembers one, and bashes in the head of the other before [[BuriedAlive burying him alive]] and going after Brescia. After garroting Brescia, Smiley decides to terrorize the entire city and prove to everyone that he is not a man to be trifled with by systemically eliminating absolutely everyone who has had any kind of recent contact--no matter how minor--with Brescia, starting with the innocent staff of a plastic surgery clinic called Desert Hearts. Smiley brutally murders three random employees of the clinic and nearly kills two others before being taken down by the LVMPD.
* ''[[Literature/Level26DarkOrigins Level 26: Dark Origins]]'': This digital novel, by ''Series/{{CSI|Verse}}'' creator Anthony Zuiker, features Sqweegel, real name unknown, the most prolific SerialKiller in history within the CSI world. Sqweegel is known for incredible preparation and his seeming randomness. Once he locks in on a victim, Sqweegel proceeds to murder them, often after [[ColdBloodedTorture torturing]] and [[SerialRapist raping]] them, with [[DepravedBisexual gender being irrelevant to his tastes]]. Sqweegel initiates the book's plot by sending in a homemade {{snuff film}} to the authorities, and proceeds to kidnap three teenagers who tried to illegally tried to buy beer before raping them with himself, a mop handle and a baseball bat. He burns six priests alive and attempts to torture the widows of 9/11 firefighters to death. His true enemy is the investigator Steven Dark, whose foster family was murdered by Sqweegel once Dark came close to catching him years ago. To “punish” Dark for cheating on his wife Sibby, Sqweegel had raped Sibby, possibly conceiving a [[WouldHurtAChild child]] which Sqweegel plans to kill, along with raping and killing Sibby. With a body count numbering in the high hundreds and the belief [[KnightTemplar he is an instrument of divine retribution]], Sqweegel remains the most terrifying enemy of Dark's career, and is the only known serial killer to receive the classification Level 26 to designate a monster that was previously beyond human comprehension.
[[/folder]]

* "Rampage" through "Rio": [[ArcVillain Antonio Riaz]] is the head of [[TheCartel the Mala Noche]] and Horatio Caine's ArchEnemy. In his first appearance, Riaz helps shoot up a courtroom to free one of his associates to help him with a business deal and later gains an enmity with Horatio, which he acts on by [[AndYourLittleDogToo killing Horatio's wife Marisol]]--who is also Eric Delko's sister. Upon his return, Riaz has a crime scene rigged with a grenade to kill one of Horatio's team to spite him and later attempts to blow up a plane filled with hundreds as a big show before being captured. Using [[ScrewTheRulesIHaveConnections his connections]] to free himself, when he returns, to continue his feud, he forces Horatio's brother and nephew to be involved in his drug business before having Horatio's brother killed and forcing Horatio's nephew to smuggle in heroin pellets into the US along with other teenage boys--sometimes die as a result of the trade--forcefully recruited by Riaz; all while keeping his father's life over the boys' head when in reality his father is already dead.
* "All Fall Down" & "Fallen": [[EvilTeacher Professor Robert "Bob" Starling]], when denied tenure on account of his student--and mistress--Melissa Walls's faked thesis, [[DisproportionateRetribution retaliates by killing]] Miami-Dade University personnel he sees as having interfered with his career. Starling shoots one victim with a remote-controlled rifle, drowns another under a pool cover, and attempts to burn the third one alive with a compound of potassium and water as a result of the victim using fake cologne. [[DestroyTheEvidence In order to suppress evidence against him]], Bob manipulates Melissa into releasing [[DeadlyGas halon gas]] in an attempt to suffocate dozens of CSI lab workers, successfully having CSI Jesse Cardoza killed.

* "[[Recap/CSINYS07E13 Party Down]]": [[TheyLookJustLikeEveryoneElse Neal Cooper]] is a seemingly unimposing young man who [[NeverMyFault blames others]] for his feelings of isolation. To this end, Neal sets up [[NastyParty a party for at least 20 people on a truck where he plans on killing the attendees]]--including four people he specifically invited from his past--having hot-wired the truck, padlocked the rear entry, and welded the emergency exit shut. While the party is going on, Neal [[TrappedInASinkingCar commandeers the truck into the Hudson River so it can sink]]. Rescued by an intended victim when he is himself trapped, Neal [[UngratefulBastard kills his rescuer]] when he realizes the latter can finger him as the perpetrator. Subsequently, Neal hides among the survivors to throw suspicion off of himself. When confronted by Detectives Mac Taylor and Jo Danville with the evidence against him, Neal refuses to take responsibility for his actions.

* ''Literature/Level26DarkOrigins Level 26: Dark Origins]]'': This digital novel, by ''Series/{{CSI|Verse}}'' creator Anthony Zuiker, features Sqweegel, real name unknown, the most prolific SerialKiller in history within the CSI world. Sqweegel is known for incredible preparation and his seeming randomness. Once he locks in on a victim, Sqweegel proceeds to murder them, often after [[ColdBloodedTorture torturing]] and [[SerialRapist raping]] them, with [[DepravedBisexual gender being irrelevant to his tastes]]. Sqweegel initiates the book's plot by sending in a homemade {{snuff film}} to the authorities, and proceeds to kidnap three teenagers who tried to illegally tried to buy beer before raping them with himself, a mop handle and a baseball bat. He burns six priests alive and attempts to torture the widows of 9/11 firefighters to death. His true enemy is the investigator Steven Dark, whose foster family was murdered by Sqweegel once Dark came close to catching him years ago. To “punish” Dark for cheating on his wife Sibby, Sqweegel had raped Sibby, possibly conceiving a [[WouldHurtAChild child]] which Sqweegel plans to kill, along with raping and killing Sibby. With a body count numbering in the high hundreds and the belief [[KnightTemplar he is an instrument of divine retribution]], Sqweegel remains the most terrifying enemy of Dark's career, and is the only known serial killer to receive the classification Level 26 to designate a monster that was previously beyond human comprehension.

* "[[Recap/CSINYS05E12 Help]]": [[VillainWithGoodPublicity Colin Clark]] is a respected nightclub owner who moonlights as the "[[SerialRapist Gramercy Rapist]]". To this end, Colin stalks women in the UsefulNotes/NewYorkCitySubway system before [[HandGagging manually gagging them]] and raping them, wearing a condom and forcing the victim to clean themselves and the crime scene to avoid leaving evidence. Having targeted 16 women in total--including an ex of Medical Examiner-turned-Detective Dr. Sheldon Hawkes--on multiple occasions Colin would [[CreepySouvenir steal a piece of his target's jewelry]], which he would give to his fiancée Mary Lowe. Having killed his most recent victim, when confronted in front of Mary by Detective Stella Bonasera, Colin attempts to play innocent before violently resisting arrest.

* "[[Recap/CSIS12E3Bittersweet Bittersweet]]": [[ManipulativeBitch Gina Sinclair]] is a [[WouldHurtAChild pedophilic]] master manipulator who had her weak-willed husband, Todd, help her rape, torture, and murder five little girls, with the only survivor of the killing spree being Colleen Hughes, who was held prisoner for three years by the Sinclairs. The couple would film themselves abusing their victims, who Gina enjoyed violating with beer bottles while being watched by Todd. When they were caught, Gina got a lenient sentence by convincing the jury that she was [[WoundedGazelleGambit abused and enslaved by Todd]]. After being paroled, an unrepentant Gina coerces a man named Ryan Thomas and [[StockholmSyndrome the brainwashed Colleen]] into assisting her with the rape, torture, and murder of thirteen-year-old Samantha Chase.

%%'''Note: Due to the controversial nature of this trope, any changes (additions, removals, edits) should be discussed [[https://tvtropes.org/pmwiki/posts.php?discussion=6vic3f9h1cy5qivsenw8llok here]].'''

* "[[Recap/CSIS12E9Zippered Zippered]]" [[Recap/CSIS12E11MsWillowsRegrets through]] "[[Recap/CSIS12E12WillowsInTheWind Willows in the Wind]]": [[ArcVillain Laura Gabriel]] is a ruthless arms smuggler and supposed friend to Catherine Willows. Playing a meek and submissive wife to her sleazy private military firm head husband [[CorruptCorporateExecutive Mark]], she uses this false personality to deflect blame off her and onto him as she [[ArmsDealer funnels his company's weapons to the Mafia and the cartels]]. When the investigation starts getting too close to the truth, she hires employees of the company to murder her own lawyer and all of his staff; following this, [[YouHaveOutlivedYourUsefulness she kills the assassins]] and burns their bodies beyond recognition in order to [[FakingTheDead fake her own death]] and that of her right-hand man. She intended for an enraged Catherine to summarily execute her husband, and placed a contract on Catherine herself to clean up the last remaining loose end, not caring for her old friend in the slightest.

* ''Series/CSIMiami'' [[labelnote:Episode]]"Felony Flight"[[/labelnote]] & ''Series/{{CSINY}}'' [[labelnote:Episode]]"[[Recap/CSINYS02E07 Manhattan Manhunt]]"[[/labelnote]]: [[BastardBastard Henry Darius]] is a SerialKiller-turned-SpreeKiller known for shooting his victims in the head. As a child born from a mistress of a wealthy family, he always felt [[DrivenByEnvy jealous that his half-sisters got more attention than he did]], and as a result, became a murderer, with his first three victims [[ReplacementGoldfish looking like his sisters]]. In his first appearance, he causes a plane crash that kills two pilots and one U.S. Marshal. He then steals the marshal's gun and uses it to kill four college students and steal their car. He then travels to Miami University where he would kill two more college students after they told him about his half-sister, Alexa, and her whereabouts. He then goes to her location and kidnap her before shooting a man for his car and heading to New York City. When he arrives in New York, he murders Alexa along with six college students, before heading off to kill his second half-sister Sarah. A narcissistic sociopath, with a violently-low impulse control, [[FreudianExcuseIsNoExcuse an excuse that doesn't come close to justifying his actions]], and 20 body count to boot, Henry Darius was among the worst that both CSI teams from Miami and New York had ever had to face.

* ''Dominos'' comic, by Kris Oprisko & Gabriel Rodriguez: [[PsychoForHire "Smiley" Tallarico]] is an infamously [[AxCrazy vicious and psychopathic]] Mafia enforcer who is brought to Las Vegas by the Cavellinis. Fearing what Smiley is capable of, the Cavellinis' main rival, Don Vincent Brescia, orders a risky hit on Smiley, but Smiley survives, and proceeds to embark on a RoaringRampageOfRevenge. Smiley tracks down his two would-be assassins, tortures and dismembers one, and bashes in the head of the other before [[BuriedAlive burying him alive]] and going after Brescia. After garroting Brescia, Smiley decides to terrorize the entire city and prove to everyone that he is not a man to be trifled with by systemically eliminating absolutely everyone who has had any kind of recent contact--no matter how minor--with Brescia, starting with the innocent staff of a plastic surgery clinic called Desert Hearts. Smiley brutally murders three random employees of the clinic and nearly kills two others before being taken down by the LVMPD.
* ''Level 26: Dark Origins'': This digital novel, by ''Series/{{CSI|Verse}}'' creator Anthony Zuiker, features Sqweegel, real name unknown, the most prolific SerialKiller in history within the CSI world. Sqweegel is known for incredible preparation and his seeming randomness. Once he locks in on a victim, Sqweegel proceeds to murder them, often after [[ColdBloodedTorture torturing]] and [[SerialRapist raping]] them, with [[DepravedBisexual gender being irrelevant to his tastes]]. Sqweegel initiates the book's plot by sending in a homemade {{snuff film}} to the authorities, and proceeds to kidnap three teenagers who tried to illegally tried to buy beer before raping them with himself, a mop handle and a baseball bat. He burns six priests alive and attempts to torture the widows of 9/11 firefighters to death. His true enemy is the investigator Steven Dark, whose foster family was murdered by Sqweegel once Dark came close to catching him years ago. To “punish” Dark for cheating on his wife Sibby, Sqweegel had raped Sibby, possibly conceiving a [[WouldHurtAChild child]] which Sqweegel plans to kill, along with raping and killing Sibby. With a body count numbering in the high hundreds and the belief [[KnightTemplar he is an instrument of divine retribution]], Sqweegel remains the most terrifying enemy of Dark's career, and is the only known serial killer to receive the classification Level 26 to designate a monster that was previously beyond human comprehension.

[[AC:''Series/WithoutATrace'']]
* "Lost Boy": An [[NoNameGiven unnamed conman]] reaches [[HumanTrafficking new heights of depravity]] to satisfy his {{greed}}. Targeting families who had adopted children from Africa, he [[ManipulativeBastard manipulates]] the parents into giving the kids to him. With the kids in hand, the conman happily sells them on the BlackMarket, uncaring about what horrific crimes would happen to the children so long as it lined his pockets.

* "[[Recap/CSIS14E16KillerMoves Killer Moves]]": [[ThemeSerialKiller Jenny Carroll]] became obsessed with a legendary chess game and wanted to prove herself better after her father wouldn't allow her to play chess as a child. Jenny [[ManipulativeBitch manipulates]] a fan of the chess game's loser into helping her murder eight innocent people by drugging them before stabbing or beating to death and posing them on street intersections which correspond to the moves from the game. Eventually getting rid of her accomplice after [[YouHaveOutlivedYourUsefulness he'd outrun his use]], Jenny kidnaps both participants of the tournament to force them to do a rematch intending to off them afterwards, in a vain attempt to prove herself superior.

* "All Fall Down" & "Fallen": [[EvilTeacher Professor Robert "Bob" Starling]], when denied tenure on account of his student and mistress Melissa Walls's faked thesis, retaliates by [[DisproportionateRetribution killing]] Miami-Dade University personnel he sees as having interfered with his career. Shooting one victim with a remote-controlled rifle, drowning another under a pool cover, and attempting to burn the third one alive with a compound of potassium and water as a result of the victim using fake cologne, Bob [[CallingCard sends the Miami-Dade Police Department mocking letters]] anticipating that they arrive too late. In order to [[DestroyTheEvidence suppress evidence against him]], Bob manipulates Melissa into releasing [[DeadlyGas halon gas]] in an attempt to suffocate dozens of CSI lab workers, successfully having CSI Jesse Cardoza killed, subsequently sending Lt. Horatio Caine on a wild goose chase leading to a fake bomb at a local beach.

* "[[Recap/CSINYS05E12 Help]]": [[VillainWithGoodPublicity Colin Clark]] is a respected nightclub owner who moonlights as the "[[SerialRapist Gramercy Rapist]]". To this end, Colin stalks women in the New York Subway system before [[HandGag manually gagging them]] and raping them, wearing a condom and forcing the victim to clean themselves and the crime scene to [[DestroyTheEvidence avoid leaving evidence]]; an ex of the medical examiner, Dr. Sheldon Hawkes, was among his past targets. On multiple occasions, Colin would [[CreepySouvenir steal a piece of his victim's jewelry]], which he would give to his fiancée Mary Lowe. Having killed his most recent victim, when confronted in front of Mary by Detective Stella Bonasera, Colin attempts to play innocent before violently resisting arrest.

* "[[Recap/ColdCaseS1E23LoversLane Lovers' Lane]]": [[SerialRapist Jim Larkin]] is a [[VillainousGlutton slovenly glutton]]. Too lazy to even abduct victims himself, he instead badgers his abused and weak-willed son to do so for him, usually unattractive teenage girls he pretends to befriend. His assaults--including one murder--are brutal, reaching the point at which he murders one of his victims simply for calling him "disgusting".
* "[[Recap/ColdCaseS3E9APerfectDay A Perfect Day]]": [[DomesticAbuser Roger Mulvaney]] ruthlessly beats his wife and two daughters and uses his position as a police officer to get away with the abuse. Once his wife decides to leave him for another man he resolves that [[IfICantHaveYou if he can't have them, nobody could]]. He kidnaps the three of them and makes his wife watch as he throws one of the girls--only four years old--from a tall bridge.

* "[[Recap/WithoutATraceS03E23 Endgame]]" & "[[Recap/WithoutATraceS04E01 Showdown]]": Emil Dornvald is a mercenary working for an African dictator. The missing person of the week is in love with a rebel opposing said dictator and knew where he and his friends were holed up. Dornvald cold-bloodedly murders the pregnant teenager she's been mentoring and is very fond of, sends her a picture on the girl's phone, and offers to stop killing her loved ones if she just tells him where the men are.
* "Lost Boy": A conman is preying on families who had adopted children from Africa; he'd claim to be the kid's birth father and guilt the parents into surrendering the kids to him, whereupon he'd take them and sell them on the black market. He also manipulated a Sudanese war orphan into helping him by claiming that he was only stealing the children to get them back to their birth parents, the young man having lost his own mother to militants. When the orphan finds out he's been had, he [[TheDogBitesBack brutally stabs the guy to death]] and the FBI quite understandably decide to look the other way.
[[/folder]]

[[AC:{{Crossover}}s]]
[[folder:Examples]]

** Part 3 (''Series/{{CSI}}''[='s=] "[[Recap/CSIS10E7TheLostGirls The Lost Girls]]"): [[BigBad Dimitri Sadesky]] is a leader of the Zetas and is responsible for arranging for countless women to be kidnapped throughout the U.S., their organs harvested, and them forced into prostitution. In his role [[EvilTeacher as a college professor]], Dimitri exploits his position to lure students into sex work. He's also had them killed whenever they try to escape from their imprisonment, even [[SerialKiller killing four women himself]] after he is done [[ColdBloodedTorture torturing]] them, and he also murdered Samantha Matthews before having a butcher from Miami dismember and dispose of her corpse.

->'''Trent Reager''': A few months ago, I saw this guy out on Third, tripping on acid. He was, like, out of his mind, and it was just so so weird. And that is when I came up with that rig for the bathroom. You have to admit it is pretty clever.\\
'''Captain Jim Brass''': Five people are dead, one is in the hospital.\\
'''Reager''': Hey, I just put the gas in the car okay? They're the ones that crashed it. Come on you've got my tapes; you've seen 'em. That first dude, hacking his legs off. Or that teacher oh, and the homeless guy. I mean, the dude is already a total mess, and then the lady has all those dolls! I mean, that was a gift. Or the poor Mexican guy killing his wife. Honestly, I didn't see that coming. I mean, that that that was awesome.

* "Tinder Box": [[GloryHound Danny Maxwell]], the bouncer at "Club Descent", resorts to [[EngineeredHeroics unethical means]] to make himself into a hero. Having doused curtains with rum so that the pyrotechnics would light them on fire, Danny intends to [[HeroicFireRescue engineer a rescue of the patrons from the inferno]], killing a bartender who witnesses him and attempting to [[FrameUp frame him]]. As a result of Danny's actions, over a dozen people die and several more are injured, notably a woman being trampled and another woman injuring herself in a shower as a result of smoke inhalation. Eventually confronted by [=CSIs=] Eric Delko and Tim "Speed" Speedle, Danny [[MotiveRant tries to justify his actions by saying he wanted to be a hero]], much to the disappointment of his former friend Delko.

As gritty crime dramas, it's not surprising the series that make up the Series/CSIVerse have quite a few [[CompleteMonster monstrous villains]].

* "[[Recap/CSIS4E1AssumeNothing Assume Nothing]]": Mandy and Cameron Klinefeld put the "unholy" back in UnholyMatrimony. A married couple united by a shared sexual fetish for rape and murder, the pair operate by abducting other husbands and wives, sexually torturing the women while making the men watch, with the ultimate goal of forcing them to MercyKill the women they love. They promise the husbands they can go free if they do this, but [[ILied they're lying]].

* "[[Recap/CSIS12E9Zippered Zippered]]", "[[Recap/CSIS12E11MsWillowsRegrets Ms. Willows Regrets]]", "[[Recap/CSIS12E12WillowsInTheWind Willows in the Wind]]": [[ArcVillain Laura Gabriel]] is a ruthless arms smuggler and supposed friend to Catherine Willows. Playing a meek and submissive wife to her sleazy private military firm head husband [[CorruptCorporateExecutive Mark]], she uses this false personality to deflect blame off her and onto him as she [[ArmsDealer funnels his company's weapons to the Mafia and the cartels]]. When the investigation starts getting too close to the truth, she hires employees of the company to murder her own lawyer and all of his staff; following this, [[YouHaveOutlivedYourUsefulness she kills the assassins]] and burns their bodies beyond recognition in order to [[FakingTheDead fake her own death]] and that of her right-hand man. She intended for an enraged Catherine to summarily execute her husband, and placed a contract on Catherine herself to clean up the last remaining loose end, not caring for her old friend in the slightest.

* [[WouldHurtAChild Stewart Otis]], first appearing in season 1's "Broken", is a pedophilic SerialKiller and SerialRapist who targeted little girls around the ages of five to eight years. While acting as an authority figure, he would kidnap the girls to take to his home for him to rape and strangle to death before burying the bodies in is backyard. He has done this to eight little girls and only laments his latest victim, Ruthie, because she died before he got a chance to "play" with her. He later appears in the season's finale "Body Count", where he escaped prison with the help of two fellow inmates, Hank Kerner and Randall Kaye. He then [[UngratefulBastard returns the latter's favor]] by kidnapping his daughter, Emma, taking her to a cabin where he not only raped her, but force her to partake in a [[SnuffFilm film]] taunting Horatio Caine, the person who arrested him. He then tries to kill her before trying to find her cousin, Robyn, hoping to do the same thing to her.
* [[ArcVillain Antonio Riaz]] is the head of [[TheCartel the Mala Noche]] and Horatio Caine's ArchEnemy. Debuting in season 4's "Rampage", Riaz helps shoot up a courtroom to free one of his associates to help him with a business deal and later gains an enmity with Horatio, which he acts on by [[AndYourLittleDogToo killing Horatio's wife Marisol]]--who is also Eric Delko's sister. Returning in the next episode, the season finale "One of Our Own", Riaz has a crime scene rigged with a grenade to kill one of Horatio's team to spite him and later attempts to blow up a plane filled with hundreds as a big show before being captured. Using [[ScrewTheRulesIHaveConnections his connections]] to free himself, he returns in the season 5 premiere "Rio", where, to continue his feud, he forces Horatio's brother and nephew to be involved in his drug business before having Horatio's brother killed and forcing Horatio's nephew to smuggle in heroin pellets into the US along with other teenage boys--sometimes die as a result of the trade--forcefully recruited by Riaz; all while keeping his father's life over the boys' head when in reality his father is already dead.

* "[[Recap/CSINYS07E13 Party Down]]": [[TheyLookJustLikeEveryoneElse Neal Cooper]] is a seemingly unimposing young man who [[NeverMyFault blames others]] for his feelings of isolation. To this end, Neal sets up [[NastyParty a party for at least 20 people on a truck where he plans on killing the attendees]]--including four people he specifically invited from his past--having hot-wired the truck, padlocked the rear entry, and welded the emergency exit shut. While the party is going on, Neal commandeers the truck into the Hudson River [[TrappedInASinkingCar so it can sink]]. Rescued by an intended victim when he is himself trapped, Neal [[UngratefulBastard kills his rescuer]] when he realizes the latter can finger him as the perpetrator. Subsequently, Neal hides among the survivors to throw suspicion off of himself. When confronted by Detectives Mac Taylor and Jo Danville with the evidence against him, Neal refuses to take responsibility for his actions, instead blaming others.

* "[[Recap/CSIS6E15PiratesOfTheThirdReich Pirates of the Third Reich]]": [[MadDoctor Leon Sneller]] rejected his Jewish upbringing in favor of Nazism, and set out to continue the work of Josef Mengele. Taking his own twin brother captive, Sneller experiments on and eventually kills him, afterward [[KillAndReplace stealing his identity]] so that he can use his job at a sleep clinic to find subjects for his experiments, which he conducts in a secret laboratory modeled after [[PoWCamp Auschwitz]]. Sneller mutilates or murders 21 people, and treats the victims like death camp prisoners, keeping them shackled while he shaves, brands, and starves them; Sneller's atrocities include crudely sewing two brothers together to create artificial conjoined twins; injecting people with flesh-eating bacteria; and lobotomizing a man and taking one of his eyes, which he tries to transplant into Lady Heather's [[MismatchedEyes heterochromatic]] daughter, Zoe, who gnaws her own hand off in a failed bid to escape from Sneller's TortureCellar.

* Season 12: [[ArcVillain Laura Gabriel]] is a ruthless arms smuggler and supposed friend to Catherine Willows. Playing a meek and submissive wife to her sleazy private military firm head husband [[CorruptCorporateExecutive Mark]], she uses this false personality to deflect blame off her and onto him as she [[ArmsDealer funnels his company's weapons to the Mafia and the cartels]]. When the investigation starts getting too close to the truth, she hires employees of the company to murder her own lawyer and all of his staff; following this, [[YouHaveOutlivedYourUsefulness she kills the assassins]] and burns their bodies beyond recognition in order to [[FakingTheDead fake her own death]] and that of her right-hand man. She intended for an enraged Catherine to summarily execute her husband, and placed a contract on Catherine herself to clean up the last remaining loose end, not caring for her old friend in the slightest.

* [[SnakesAreSinister Python]], real name [[TheCracker Dante Wilkerson]], is one of the world's most wanted hackers. A figure born with reptilian skin, he would run a website where he sells faulty guns and drugs in the hope of creating [[ForTheEvulz anarchy]]. When cornered by the authorities, he would brutally torture and kill any agents sent against him. He would also hack various government agencies and release the information to criminals. Becoming obsessed with Agent Avery Ryan, he would kidnap, torture and even, just to mess with her, would give drugs to Avery's friend. About to be captured, he threatened to use his tech skills to overdose the friend if they don’t [[CriminalMindGames solve his riddles]], but later [[ILied attempts to kill her anyway]]. After failing, he tracks Avery down and kills the agents guarding her in the sick hope that if she kills him, she would become just like him. Python mixes cold sociopathy and vindictiveness and stands out as one of the most wicked of the franchise has ever produced.

->''"Once hope is gone, dying's just a formality."''
-->--'''"John Smith"''', ''Series/ColdCase'', [[Recap/ColdCaseS5E15TheRoad "The Road"]]

As gritty crime dramas, it's not surprising the series that consist of the Series/CSIVerse have quite a few [[CompleteMonster monstrous villains]].

* "[[Recap/CSIS14E16KllerMoves KillerMoves]]": [[ThemeSerialKiller Jenny Carroll]] became obsessed with a legendary chess game and wanted to prove herself better after her father wouldn't allow her to play chess as a child. Jenny [[ManipulativeBitch manipulates]] a fan of the chess game's loser into helping her murder eight innocent people by drugging them before stabbing or beating to death and posing them on street intersections which correspond to the moves from the game. Eventually getting rid of her accomplice after [[YouHaveOutlivedYourUsefulness he'd outrun his use]], Jenny kidnaps both participants of the tournament to force them to do a rematch intending to off them afterwards, in a vain attempt to prove herself superior.

* "[[Recap/CSINYS05E14 She's Not There]]": [[BitchInSheepsClothing Carolyn Williams]] is a leader in a HumanTrafficking ring. Carolyn lures in girls from around the world who are aged 14-21 and [[ModelScam promises them jobs as models]]. Carolyn befriends them and brings to a party where she and her partner drug and then kidnap them. They then take them a warehouse where the girls are beaten and drugged into submission using heroin. They are then [[SexSlave forced into prostitution]] for money, with this operation having run for years and with an estimated victim count in the dozens.

[[AC:{{Crossover}}s]]

* Henry Darius, from a ''Series/CSIMiami''-''Series/{{CSINY}}'' crossover, is a SerialKiller-turned-SpreeKiller known for shooting his victims in the head. As a child born from a mistress of a wealthy family, he always felt [[DrivenByEnvy jealous]] that his half-sisters got [[AttentionWhore more attention than he did]], and as a result, became a murderer, with his first three victims [[ReplacementGoldfish looking like his sisters]]. First appearing in the season 4 ''Miami'' episode "Felony Flight", he causes a plane crash that kills two pilots and one U.S. Marshal. He then steals the marshal's gun and uses it to kill four college students and steal their car. He then travels to Miami University where he would kill two more college students after they told him about his half-sister, Alexa, and her whereabouts. He then goes to her location and kidnap her before shooting a man for his car and heading to New York City. When he arrives there in the season 2 ''NY'' episode "[[Recap/CSINYS02E07 Manhattan Manhunt]]", he murders Alexa along with six college students, before heading off to kill his second half-sister Sarah. A narcissistic sociopath, with a violently-low impulse control, [[FreudianExcuseIsNoExcuse an excuse that doesn't come close to justifying his actions]], and 20+ body count to boot, Henry Darius was among the worst that both CSI teams from Miami and New York had ever had to face.
* ''CSI: Trilogy'' [[note]]crossover between ''Series/CSIMiami'', ''Series/{{CSINY}}'', and ''Series/{{CSI}}''[[/note]]: These three represent the worst that [[HumanTrafficking the Zetas]] have to offer:
** [[StarterVillain Jimmy Burris]], from part 1, the season 8 ''Miami'' episode "Bone Voyage", is a pimp who tricks numerous women throughout Miami into working for him by [[ModelScam posing as a recruiter for a model agency]], where he would then have them [[SexSlave forced into prostitution]], even having sex with them himself. When one of his prisoners, Ashley Tanner, tries to escape, Burris tracked her down, planning to dismember her while she's still alive, before dumping her remains in the swamps.
** [[SerialKiller Casey Steele]], from part 2, the season 6 ''NY'' episode "[[Recap/CSINYS06E07 Hammer Down]]", transports the abducted women throughout the U.S., where he would harvest the women's [[OrganTheft organs]] by extracting them from their bodies while they are [[AndIMustScream still alive and conscious]], his victims dying in excruciating pain; Debbie Menzel is one such example, with Steele cutting her open to extract her liver before she dies. When he retrieves Madeleine Briggs from Jimmy Burris's liaison, Tyler Goodman, Steele murders Tyler after [[YouHaveOutlivedYourUsefulness he served his purpose]]. After causing a car accident that killed a man, Steele forces an innocent bystander to drive him and his captive away from the car crash and into New York City before shooting him and leaving him to die; he would shoot at several New York [[CopKiller cops]] when he makes his attempts to leave the city.
** [[BigBad Dimitri Sadesky]], from part 3, the season 10 ''CSI'' episode "[[Recap/CSIS10E7TheLostGirls The Lost Girls]]", is a leader of the Zetas and is responsible for arranging for countless women to be kidnapped throughout the U.S., their organs harvested, and them forced into prostitution. He's also had them to be killed whenever they try to escape from their imprisonment, even [[SerialKiller killing four women himself]] after he is done [[ColdBloodedTorture torturing]] them, and he also murdered Samantha Matthews before having a butcher from Miami dismember and dispose of her corpse. He also has Madeleine Briggs kidnapped and be sold to his clients where he forcibly impregnates her to increase her value to them, only to leave her to die after she suffers a miscarriage, considering her to [[YouHaveOutlivedYourUsefulness now be worthless to him]].

* [[ArcVillain Antonio Riaz]] is the head of [[TheCartel the Mala Noche]] and Horatio Caine's ArchEnemy. Debuting in season 4's "Rampage", Riaz helps shoot up a courtroom to free one of his associates to help him with a business deal and later gains an enmity with Horatio, which he acts on by [[AndYourLittleDogToo killing Horatio's wife Marisol]]--who is also Eric Delko's sister. Returning in the next episode, the season finale "One of Us", Riaz has a crime scene rigged with a grenade to kill one of Horatio's team to spite him and later attempts to blow up a plane filled with hundreds as a big show before being captured. Using [[ScrewTheRulesIHaveConnections his connections]] to free himself, he returns in the season 5 premiere "Rio", where, to continue his feud, he forces Horatio's brother and nephew to be involved in his drug business before having Horatio's brother killed and forcing Horatio's nephew to smuggle in heroin pellets into the US along with other teenage boys--sometimes die as a result of the trade--forcefully recruited by Riaz; all while keeping his father's life over the boys' head when in reality his father is already dead.

* "[[Recap/CSINYS05E14 She's Not There]]": [[BitchInSheepsClothing Carolyn Williams]] is a leader in a HumanTrafficking ring. Carolyn lures in girls from around the world who are aged 14-21 and [[YouWouldMakeAGreatModel promises them jobs as models]]. Carolyn befriends them and brings to a party where she and her partner drug and then kidnap them. They then take them a warehouse where the girls are beaten and drugged into submission using heroin. They are then [[SexSlave forced into prostitution]] for money, with this operation having run for years and with an estimated victim count in the dozens.

** [[StarterVillain Jimmy Burris]], from part 1, the season 8 ''Miami'' episode "Bone Voyage", is a pimp who tricks numerous women throughout Miami into working for him by [[YouWouldMakeAGreatModel posing as a recruiter for a model agency]], where he would then have them [[SexSlave forced into prostitution]], even having sex with them himself. When one of his prisoners, Ashley Tanner, tries to escape, Burris tracked her down, planning to dismember her while she's still alive, before dumping her remains in the swamps.

* Season 12: [[ArcVillain Laura Gabriel]] is a ruthless arms smuggler and BigBadFriend to Catherine Willows. Playing a meek and submissive wife to her sleazy private military firm head husband [[CorruptCorporateExecutive Mark]], she uses this false personality to deflect blame off her and onto him as she funnels his company's weapons to the Mafia and the cartels. When the investigation starts getting too close to the truth, she hires employees of the company to murder her own lawyer and all of his staff; following this, [[YouHaveOutlivedYourUsefulness she kills the assassins]] and burns their bodies beyond recognition in order to fake her own death and that of her right-hand man. She intended for an enraged Catherine to [[VigilanteExecution summarily execute her husband]], and placed a contract on Catherine herself to clean up the last remaining loose end, not caring for her old friend in the slightest.

''[[AC: Series/{{CSI}}]]''
* [[SerialKiller Gordon Daimler]], aka [[SerialRapist Adam van der Welk]], from season 2's "[[Recap/CSIS2E22CrossJurisdictions Cross Jurisdictions]]", is a limo driver who targets wealthy couples. He kills the husbands first and then, after 48 hours of "fun and games", kills the wives. Having already done this with 3 previous couples, his latest target was the former Las Vegas Chief of Detectives; he then took the wife and the Chief's young daughter to [[Series/CSIMiami Miami]], where he kills the wife; the daughter manages to escape, despite Daimler [[WouldHurtAChild trying to shoot her]]. He rapes and kills a fifth woman, and unsuccessfully attempts to kill her husband.
* Mandy and Cameron Klinefeld from season 4's "Assume Nothing" put the "unholy" back in UnholyMatrimony. A married couple united by a shared sexual fetish for rape and murder, the pair operate by abducting other husbands and wives, sexually torturing the women while making the men watch, with the ultimate goal of forcing them to MercyKill the women they love. They promise the husbands they can go free if they do this, but [[ILied they're lying]].
* [[MadDoctor Leon Sneller]], from season 6's "Pirates of the Third Reich", rejected his Jewish upbringing in favor of Nazism, and set out to continue the work of Josef Mengele. Taking his own twin brother captive, Sneller experiments on and eventually kills him, afterward [[KillAndReplace stealing his identity]] so that he can use his job at a sleep clinic to find subjects for his experiments, which he conducts in a secret laboratory modeled after [[PoWCamp Auschwitz]]. Sneller mutilates or murders 21 people, and treats the victims like death camp prisoners, keeping them shackled while he shaves, brands, and starves them; Sneller's atrocities include crudely sewing two brothers together to create artificial conjoined twins; injecting people with flesh-eating bacteria; and lobotomizing a man and taking one of his eyes, which he tries to transplant into Lady Heather's [[MismatchedEyes heterochromatic]] daughter, Zoe, who gnaws her own hand off in a failed bid to escape from Sneller's TortureCellar.
* [[ManipulativeBitch Gina Sinclair]], from season 12's "[[Recap/CSIS12E3Bittersweet Bittersweet]]", is a [[WouldHurtAChild pedophilic]] master manipulator who had her weak-willed husband, Todd, help her rape, torture, and murder five little girls, with the only survivor of the killing spree being Colleen Hughes, who was held prisoner for three years by the Sinclairs. The couple would film themselves abusing their victims, who Gina enjoyed violating with beer bottles while being watched by Todd. When they were caught, Gina got a lenient sentence by convincing the jury that she was [[WoundedGazelleGambit abused and enslaved by Todd]]. After being paroled, an unrepentant Gina coerces a man named Ryan Thomas and [[StockholmSyndrome the brainwashed Colleen]] into assisting her with the rape, torture, and murder of thirteen-year-old Samantha Chase.
* [[ArcVillain Laura Gabriel]], from season 12, is a ruthless arms smuggler and BigBadFriend to Catherine Willows. Playing a meek and submissive wife to her sleazy private military firm head husband [[CorruptCorporateExecutive Mark]], she uses this false personality to deflect blame off her and onto him as she funnels his company's weapons to the Mafia and the cartels. When the investigation starts getting too close to the truth, she hires employees of the company to murder her own lawyer and all of his staff; following this, [[YouHaveOutlivedYourUsefulness she kills the assassins]] and burns their bodies beyond recognition in order to fake her own death and that of her right-hand man. She intended for an enraged Catherine to [[VigilanteExecution summarily execute her husband]], and placed a contract on Catherine herself to clean up the last remaining loose end, not caring for her old friend in the slightest.
* [[SerialRapist Tom Cooley]], from season 13's "CSI on Fire", led the gang rape on Marla Louie before attempting to kill her by [[BuriedAlive burying her alive]]. He would later go on to rape eight more women before [[SerialKiller strangling them]] and dumping the corpses under his family's ranch. He would also kill his cohort, Max Liston, in a [[MakeItLookLikeAnAccident scuba-diving accident]], and it's implied he was planning to kill his lawyer Gavin Pearson before Pearson managed to kill Cooley first.
* [[ThePeepingTom Trent Reager]], from season 14's "Check in and Check Out", is a voyeuristic motel owner who [[FromNobodyToNightmare graduates]] to full-on [[SerialKiller murderer]] due to his love of watching people. Spying on the people who check into his motel, Trent decides to spice things up by applying an LSD hallucinogen spray canister and dowsing his customers in room 114, causing them to go wild and violent, leading to a young man stabbing himself to death; a loving husband beating his wife to death; a homeless man stabbing a kindly couple to death though a hundred knife wounds each; and a teacher gutting her student. Completely proud of his crimes that have led to innocent people being jailed, Trent stands as one of the most unique and horrific killers in all of ''CSI''.
* [[ThemeSerialKiller Jenny Carroll]], from season 14's "Killer Moves", became obsessed with a legendary chess game and wanted to prove herself better after her father wouldn't allow her to play chess as a child. Jenny [[ManipulativeBitch manipulates]] a fan of the chess game's loser into helping her murder eight innocent people by drugging them before stabbing or beating to death and posing them on street intersections which correspond to the moves from the game. Eventually getting rid of her accomplice after [[YouHaveOutlivedYourUsefulness he'd outrun his use]], Jenny kidnaps both participants of the tournament to force them to do a rematch intending to off them afterwards, in a vain attempt to prove herself superior.

''[[AC: Series/CSIMiami]]''
* [[WouldHurtAChild Stewart Otis]], first appearing in season 1's "Broken", is a pedophilic SerialKiller and SerialRapist who targeted little girls around the ages of five to eight years. While acting as an authority figure, he would kidnap the girls to take to his home for him to rape and strangle to death before burying the bodies in is backyard. He has done this to eight little girls and only lamenting on his latest victim, Ruthie, because she died too quickly before he got a chance to "play" with her. He later appears in the season's finale "Body Count", where he escaped prison with the help of two fellow inmates, Hank Kerner and Randall Kaye. He then [[UngratefulBastard returns the latter's favor]] by kidnapping his daughter, Emma, taking her to a cabin where he not only raped her, but force her to partake in a [[SnuffFilm film]] taunting Horatio Caine, the person who arrested him. He then tries to kill her before trying to find her cousin, Robyn, hoping to do the same thing to her.

* [[EgomaniacHunter Wesley Habeck]], from season 9's "Hunting Ground", is the founder of an underground club dedicated to HuntingTheMostDangerousGame. After buying undocumented male immigrants from a smuggler, Habeck holds the men captive for a time, during which he treats them like animals, keeping them chained up and wallowing in their own filth while he [[SlaveBrand brands]] them and pumps them full of steroids, ensuring that they remain compliant by threatening to kill any loved ones that they took with them from the Caribbean. When the time comes, Habeck and one or two of the people who have bought their way into his organization hunt the men through the Everglades. When he realizes that the authorities are closing in on him, Habeck sends a pair of club members out to hunt his remaining two captives, then [[DirtyCoward drives off and leaves them in the middle of nowhere as he prepares to flee Miami]].
* [[SerialRapist Edwin Chambers]], from season 10's "Crowned", is a pageant director who arranges beauty pageants to lure [[WouldHurtAChild young girls]] before abducting them and taking them to an abandoned movie theater where he then proceeds to [[RapeIsASpecialKindOfEvil rape]] them, already raping countless girls, including Jan Gramercy when she was young. He later kidnaps Tori Haverford, and [[AttemptedRape tries to rape her]] before attempting to kill her when he gets cornered by Horatio and Natalia.

''[[AC:Series/{{CSINY}}]]''
* [[BitchInSheepsClothing Carolyn Williams]], from season 5's "She's Not There", is a leader in a HumanTrafficking ring. Carolyn lures in girls from around the world who are aged 14-21 and [[YouWouldMakeAGreatModel promises them jobs as models]]. Carolyn befriends them and brings to a party where she and her partner drug and then kidnap them. They then take them a warehouse where the girls are beaten and drugged into submission using heroin. They are then [[SexSlave forced into prostitution]] for money, with this operation having run for years and with an estimated victim count in the dozens.

[[AC: {{Crossover}}s]]
* Henry Darius, from a ''Series/CSIMiami''-''Series/{{CSINY}}'' crossover, is a SerialKiller-turned-SpreeKiller known for shooting his victims in the head. As a child born from a mistress of a wealthy family, he always felt [[DrivenByEnvy jealous]] that his half-sisters got [[AttentionWhore more attention than he did]], and as a result, became a murderer, with his first three victims [[ReplacementGoldfish looking like his sisters]]. First appearing in the season 4 ''Miami'' episode "Felony Flight", he causes a plane crash that kills two pilots and one U.S. Marshal. He then steals the marshal's gun and uses it to kill four college students and steal their car. He then travels to Miami University where he would kill two more college students after they told him about his half-sister, Alexa, and her whereabouts. He then goes to her location and kidnap her before shooting a man for his car and heading to New York City. When he arrives there in the season 2 ''NY'' episode "Manhattan Manhunt", he murders Alexa along with six college students, before heading off to kill his second half-sister Sarah. A narcissistic sociopath, with a violently-low impulse control, [[FreudianExcuseIsNoExcuse an excuse that doesn't come close to justifying his actions]], and 20+ body count to boot, Henry Darius was among the worst that both CSI teams from Miami and New York had ever had to face.

** [[SerialKiller Casey Steele]], from part 2, the season 6 ''NY'' episode "Hammer Down", transports the abducted women throughout the U.S., where he would harvest the women's [[OrganTheft organs]] by extracting them from their bodies while they are [[AndIMustScream still alive and conscious]], his victims dying in excruciating pain; Debbie Menzel is one such example, with Steele cutting her open to extract her liver before she dies. When he retrieves Madeleine Briggs from Jimmy Burris's liaison, Tyler Goodman, Steele murders Tyler after [[YouHaveOutlivedYourUsefulness he served his purpose]]. After causing a car accident that killed a man, Steele forces an innocent bystander to drive him and his captive away from the car crash and into New York City before shooting him and leaving him to die; he would shoot at several New York [[CopKiller cops]] when he makes his attempts to leave the city.

''[[AC:Series/CSICyber]]''

''[[AC: Series/ColdCase]]''
* [[DepartmentOfChildDisservices Josh Freely]], from season 1's "[[Recap/ColdCaseS1E8FlyAway Fly Away]]", is a brutal [[WouldHurtAChild pedophile]] who uses his position, as a social worker working with emotionally unstable parents, to find new victims, of which he has 8 at the very least. Freely piles emotional abuse onto the parents, making them feel as though they're worthless, so they surrender their kids to him, and if that doesn't work, he's more than happy to fudge his own records so his superiors order the children removed. His abuse eventually reaches the point that one such mother attempts to [[DrivenToSuicide kill herself]] and her young daughter--with the latter dying--rather than [[FateWorseThanDeath let Freely take her]].
* [[SerialRapist Jim Larkin]], from the season 1 finale, "[[Recap/ColdCaseS1E23LoversLane Lovers' Lane]]", is a [[VillainousGlutton slovenly glutton]]. Too lazy to even abduct victims himself, he instead badgers his abused and weak-willed son to do so for him, usually unattractive teenage girls he pretends to befriend. His assaults--including one murder--are brutal, reaching the point at which he murders one of his victims simply for calling him "disgusting".
* [[DomesticAbuser Roger Mulvaney]], from season 3's "[[Recap/ColdCaseS3E9APerfectDay A Perfect Day]]", ruthlessly beats his wife and two daughters and uses his position as a police officer to get away with the abuse. Once his wife decides to leave him for another man he resolves that [[IfICantHaveYou if he can't have them, nobody could]]. He kidnaps the three of them and makes his wife watch as he throws one of the girls--only four years old--from a tall bridge.
* "[[TheyLookJustLikeEveryoneElse John Smith]]", real name unknown, from season 5's "[[Recap/ColdCaseS5E15TheRoad The Road]]", is a depraved killer whose motivations amount to amusing himself. Disturbed since childhood, Smith once witnessed a woman drowning and didn't help her, getting off on the feeling off seeing someone lose all hope and die and sets about replicating it. Posing as a videographer to attract victims, Smith lures in women with happy lives and something to live for be it their family, a wedding or their religion and then kidnaps them before locking them in special cellars. Smith then [[MindRape psychologically torments them]] until [[DespairEventHorizon they finally break and give up hope]], whereupon he [[BuriedAlive fully seals the cellars]] and leaves them to starve to death.

''[[AC: Series/WithoutATrace]]''
* Season 3's finale and season 4's premiere had Emil Dornvald, a mercenary working for an African dictator. The missing person of the week is in love with a rebel opposing said dictator and knew where he and his friends were holed up. Dornvald cold-bloodedly murders the pregnant teenager she's been mentoring and is very fond of, sends her a picture on the girl's phone, and offers to stop killing her loved ones if she just tells him where the men are.
* Season 6's premiere had a conman preying on families who had adopted children from Africa; he'd claim to be the kid's birth father and guilt the parents into surrendering the kids to him, whereupon he'd take them and sell them on the black market. He also manipulated a Sudanese war orphan into helping him by claiming that he was only stealing the children to get them back to their birth parents, the young man having lost his own mother to militants. When the orphan finds out he's been had, he [[TheDogBitesBack brutally stabs the guy to death]] and the FBI quite understandably decide to look the other way.

[[AC: Other Media]]