I train for high center mass, shoot to stop, and and pull the trigger as many times as I possible can to neutralize the threat.
If the attacker expires due to attack on me then that is a bi-product of my act of self defense.
I know what your saying; however, for somebody wearing a civilian hat engaging somebody as a civilian you unfortunalty are under the civililan law, not Navy law, or granted special protective policing powers unless your a sworn officer. Self Defense not only entails your right to defend your self against an attacker but defend your self from a possible crimianl prosecuation, and civil suits after the encounter. Most people train and probably can defend themselves from an attacker with a gun. Most people cannot defend themselves from spilling their guts to the responding police, stating something like "I killed him" or do something that will hurt them financially down the road.