YMMV / Criminal Minds S 4 E 25 To Hell

• Complete Monster: Mason Turner, from this episode and part 2, proves to be among the nastiest unsubs the BAU has faced. Unable to hunt and kill his victims himself due to being paralyzed from the neck down, the sadistic and arrogant Mason manipulated his mentally handicapped brother, Lucas, into becoming a killing machine. Mason has Lucas drive to Detroit to kidnap transients and haul them back to their pig farm in Canada, where Lucas brutally slaughters them by crushing their neck with a sledgehammer. Mason then guides Lucas through performing pointless, cruel experiments on their remains before discarding them by feeding them to the pigs. Through this process—which Lucas watches through a complex series of mirrors to satisfy his sadistic tendencies—Mason has claimed 89 lives, and is only stopped from killing a 90 victim when the BAU raids his farm. Mason tries to pin his crimes on Lucas, who he encourages the BAU to shoot on sight. Once he's exposed for the monster that he is, Mason is smug and completely unapologetic about his crimes, coldly stating that his victims were worthless trash.