There are a few other patrons in the store, and a clerk at the checkout counter. One man armed with a handgun comes in, points the gun at the clerk, and demands the money. If you see this while in the store, how should you react? You and the robber are equally armed. After drawing your weapon (assume that is legal) you can do one of three things: 1) Open fire on the robber immediately, since he is clearly threatening the clerk. 2) Aim your weapon at the robber and say "get out of here or I'll shoot!" 3) Stay out of sight with gun drawn in case the robber tries to eliminate witnesses, and maybe call the police. #2 exposes you to the risk of them opening fire on you first. But #1 and #3 might present risks of their own: #1 Suppose the robber reflexively pulls the trigger when he is hit, and he kills the clerk. Could you be blamed for triggering his death? #3 They take the money and leave, and no one gets hurt. But you are caught on video as being armed. Could you be blamed for being armed but not doing anything to stop it? Could you be suspected as an accomplice for the same reason? By "blamed" I mean being charged under some law that requires you to assist those in need, or sued by the clerk or his family. Are these realistic concerns? How would you act in this situation?