If I shoot my pistol at someone until the threat is eliminated, I believe that person would probably be dead.
From a completely non-legal standpoint, your physical well being demands that the attacker be "stopped" right now. At the point he is a threat, you should never be concerned with whether he lives or dies. A guy who is dead but still doesn't know it has time to put you down. Shots to the torso may cause an immediate stop but not death, conversly, they may cause the death but not the immediate stop. Shots to the cranial vault are much better in stopping but are not always attainable in a gunfight.
It sounds good legally but even better from a physcial survival standpoint if you ask me.