See, that's a sticky situation...Why? Because there are gonna be cameras and various interviews by the FBI. Therefore, you're going to be told..."this guy was robbing the bank, but you were over here and he was waaay over there not even interacting with you..You shot him. That may be jail time to be honest. The robbery scenario.....no, I think most people would shoot the guy that just robbed them. Hard to say what the outcome of that could be....really is. Although, the threat was OVER and you engaged him. That's a no no.