Why did you feel the need to shoot more than one round?
A: Because the clip holds 9.
It really shouldn't matter.
Why do we need to hope for him to be incapacitated enough not to be a threat any longer, and hope he survives?
Or give him a chance to survive?
Shouldn't the assailant lose his rights as soon as he threatened to kill another?
Meet force with deadly force.
9th shot, he is definitely no longer a threat to anyone ever.
Personally I would of saved 5 rnds in case he had backup.