If I was ever a cop dealing with an unarmed man unless they're harming someone else I am NOT shooting to kill. I'm going for the leg, arm, maybe even the waist and immediately phoning EMS so I don't have a dead man on my conscience.
You would to go against a lot of training. They teach you to aim for mass and that a bullet in the arm or leg might not take someone down. The point of shooting is to neutralize a threat.