In Tennessee we can shoot to neutralize only if ALL of the following a present; Intent, Ability and Jeopardy. Under ability a weapon capable of causing injury should be present but the physical size of or number assailants can play a part in your descision.
I'd do absolutely nothing in that scenario. I'm not a cop and I'm not a super hero, so I'm not required to go around intervening in any crime that may happen. In most robberies like that, nobody is physically harmed and the suspect is usually caught shortly afterwards. Just incase the BG can hit up the local dealer before he get's caught, I'm sure the money is insured.
Well, the good samaritan and the woman both went to jail. As it turned out during the investigation the man with the knife was initialy attacked by the woman. He managed to disarm her and stab her. He was fataly shot, she survived.
If you can legaly protect others under your states laws, be sure you know the facts first. Even if you think your doing the right think, you very well might not.
Read this article written by a LEO. He was off duty when a robbery occurred. Got in a gunfight with the BG. When it was all over a 9 year old girl was dead.
The end result was that the suspect died, I survived, but a 9-year-old girl did not.
Lessons from a Fatal Shootout in a Crowded McDonaldQuote:
None of the training scenarios, books, films, etc. that I learned from touched upon the fact that when you take that gun out and decide to take action, 9-year-old kids can get killed. Even if you do everything by the book, use good tactics, and are within policy and the law, the outcome can still be negative.
I'd sworn myself an oath that if I couldn't feel that strongly about it, I shouldn't and wouldn't carry; and if I didn't feel that confident I'd be able to avoid such collateral damage, I shouldn't and wouldn't carry.
Though, of course, in this LEO's situation, it was the BG's shots that struck the innocent. Reality is, it was the BG's forcible felony that caused it all. But in the end, a child dead ... the only innocent lost. Which is itself a testament to the guy's fortitude and skills. Could've been far worse, had the BG just been a bit more wacked from his crack pipe (or whatever else it was that pushed him sideways along this path in life).
If I'm stuck in a situation where someone has threatened to use a gun (whether I see it or not), I will make sure I am always one step ahead of the BG. I won't intentionally escalate the situation, but not being a quick draw artist, I have no interest in making sure that a fight I didn't ask for is "fair".
I cannot envision a scenario (within this scenario) where he would get my wallet. Not because I give a crap about losing it, but because by the time he got close enough to me to ask for my wallet, my gun would be on him.
According to the OP, there is no weapon visible. I'm going to only be a witness in this situation, but if I can, will move to some kind of concealment. Now, if the BG draws the gun and starts ordering people around, all bets are off.
If I can do so unobserved, I'll take my gun out of the holster and keep it by my side. If he tries to rob me, he's going to get my gun in his face instead of my wallet.