In a law enforcement procedural show, when the criminal gets away with murder or a similarly heinous crime, like serial rape (either through skill on his part or mistakes on those of the cops or the lawyers) but gets killed before the end credits roll, usually in a Vigilante Execution. A subtrope of Karmic Death. Often goes with Serial Killer Killer. Often similar to Deus Ex Machina. See also Off on a Technicality for how they get out, and Vigilante Man for the sort of guys who kill this sort of guys. Examples of The Killer Becomes the Killed include: