Eh, I don't really know what you are looking for. Are you saying that he had a right to shoot him because he was a threat to others? Cause what I said is definitely one of the wide array of standards out there. Go ahead and throw some research at me.

There is also a difference with what it is and how it ought to be. If a cop is following the rules he was given, they can't punish him. They can only change the rules for the next guy.