Vigilante / vigilante justice

"When people begin to believe that organized society is unwilling or unable to impose upon criminal offenders the punishment they deserve then there are sown the seeds of anarchy - of self-help, vigilante justice, and lynch law.  San Francisco experienced vigilante justice during the Gold Rush in the middle part of the last century; the mining towns of Montana experienced it a short time later; and it is still with us as a result of the series of unsolved slayings . . . ."