The question I've always had is what criteria are applied to follow-up shots, and the time lag between each shot. Here's an example:
I fire a shot, and hit the threat. He doesn't go down - but, if I took time to notice, I might notice that he's stopped long enough to look down at the wound. Does he still constitute a threat (he hasn't dropped his weapon, he hasn't dropped to the ground, he hasn't asked me to stop)?
The reason I'm asking is because I can fire four or five shots at close range at a very rapid pace - probably five shots in 1 second if I'm pushing it. So I shoot him five times. Am I accountable to re-assess between each shot, or not? Or, what is the minimum time span where I would be held accountable? If I took 1 second between each shot, would I then be accountable for the re-assessment between each shot?
Also, if witnesses hear a "fusillade" of shots, and they're all yours, and you empty the pistol into the threat in just over a second, is that going beyond trying to "stop the threat"?