Basic Trope: Killing anyone who sees you do something wrong so you can get away with it easier.
- Straight: Bobby shoots everyone he sees so that there are no witnesses.
- Exaggerated:
- Bobby kills everyone in the city so nobody ever can see him.
- Everyone in the planet is killed, because you can't be seen if there's nobody to see you.
- Justified: Someone saw Bobby, and he doesn't know who, so he concludes it's just easier to kill everyone and hope he gets them in the process.
- Inverted: Stealth Expert, but with less killing.
- Subverted: Bobby tries to kill everyone so nobody snitches on him... but leaves one guy he didn't notice.
- Double Subverted: But Bobby double-checked, and got him anyways.
- Parodied: ???
- Averted: Everyone is alive, and well aware of the crime.
- Enforced: Everyone being killed for being a witness is a core plot element.
- Implied: A news article states that everyone nearby was killed, and there were no living witnesses.
- Downplayed: Some witnesses are killed. The ones who live are probably bribed to pretend nothing happened.
- Played for Drama: Everyone is rushing out, and Bobby has to get them before someone gets the cops on them.
- Played for Horror: Bobby kills Alice in an extremely gruesome way, out in the open, and kills everyone who sees it.
- Lampshaded: "I don't like to leave any witnesses."
- Invoked: Someone's about to call the cops on Bobby. Bobby doesn't know who, so he just kills everyone.
- Defied: Bobby kills one guy, but decides it's too much for him and just runs away with the cash instead.
- Exploited: Bobby disguises himself as one of the witnesses, and runs away once the cops leave him alone for long enough.
- Discussed: "Did you guys really kill everyone who saw you?!"
Leave No Witnesses prefers to not leave witnesses. Remain ignorant.
