In contention to shoot first, With a concealed weapon, the criminal doesn't know untill it's too late and he has a bullet in his arse, I suppose if a criminal stuck a gun in my face, Id give him my wallet and when he turned to leave Id shoot him in the back, promptly turn him over, get his fingerprints on my gun barrel and shoot him in the chest a couple times and once in the head to make sure, then call the cops, and my lawyer, this would also depend on the proximity of witnesses, and how much I had in my wallet at the time. Usually with only a couple a hundred bucks, it wouldn't be worth the hassle to shoot him. I'd probanly try and make a citizens arrest. As long as he didn't try anything he would live to rob another day. If he patted me down and had put his weapon away or out of danger I'd like to think I could put up a pretty good struggle and hopefully get to my piece before him, then dispatching him to his maker. Either way, you can usually tell if someone means you harm from a little distance and like if you see a scary looking person looking around furitively and eyeing you, cross the street, if he crosses the street to come nearer to you, pull your weapon and tell him to move away. This is perfectly legal if you feel yourself in danger. What results from that is then up to the perpetrater. As I've said "never pull your weapon unless you are prepared to use it"