And doctors kill 100,000 innocent patients each year through errors.
Every system has failures. The key is that more innocent lives are saved by killing serial killers, etc than by giving them parole (which nearly ALL lifers get) and letting them do it again and again.
Plus, I might add, that MOST of the "innocent" guys who got the axe were participants in crimes in which the question was "Who pulled the trigger?" If the triggerman turns state's evidence and convinces the jury that his "innocent" partner pulled the trigger, that "innocent" guy is no loss to society.
