Vigilante

A vigilante is a person who violates the law in order to exact what they believe to be justice from criminals, because they think that the criminal will not be caught or will not be sufficiently punished by the legal system.

Criminal Minds
Some vigilantes in various episodes.


 * "Doyle" - A Real Rain
 * Nathan Harris - Sex, Birth, Death

Real World

 * Curtis Sliwa - The Guardian Angels
 * Bernhard Goetz - The Subway Vigilante