When the attack stops, you must stop shooting, whether the attacker is dead or alive. You are only shooting to STOP, not shooting to KILL.
You do what you want to do and I’ll do what I want to do...
Two in the chest/body; the third to the head. I want the SOB dead, if he/she is still twitching...
“He made a move toward the weapon, so I shot again.”
Of course you do.
But that's not the story to tell the police.