I enthusiastically advocate cops or armed civilians killing life-long criminals in the commission of a crime. Criminals like this are only going to reoffend until they kill someone.
Police can use deadly force to a) Protect their own lives, or b) to protect the innocent.
You are starting to sound like a cop hater.
Your'e either a bleeding heart liberal, an idiot, or both. I'm done trying to draw this out for you on a chalk board. You are probably one of those supporters of Palestinian "freedom fighters" aren't you?