[Bancakes]

In conceal carry weapon courses in the USA, there's three factors that stand out in a self defense situation. Ability, Opportunity, and Jeopardy. Is the person capable of hurting you, can he do it at a given moment, and is he doing it or about to do it? With few exceptions, those who shoot in self defense and abide by these three factors, don't go to prison.

You can watch some Massad Ayoob videos on the topic, though they are pretty old.