ITT: Tinfoil hatted people and arrogant people who say he should have shot him in a non lethal place.
Those pictures are different places so that is discredited, and not valid proof.
If someone is threatening to use deadly force, you return with deadly force. That is the cops job. They are trained to do that. (It's common sense, is it not?) If you think that shooting someone in the leg, is going to prevent you from getting shot good luck if this situation ever happens to you.
No, the cops do not want to kill anybody, that's the worse thing someone could do. They are left with that for the rest of their life.