A man is acting strange outside of a gas station and is obviously displaying a gun. Police in this case have said the gun was a .45. A patron at the gas station approaches him and asks him about his behavior and the gun. Somehow the Good Samaritan gains access to the firearm. At this point the other man begins acting aggressive and advancing on the Good Samaritan.
Despite two warnings to stay back, the strange acting man continues to approach and the Good Samaritan fires a single shot to the leg.
Was he within his rights to get involved? Gow did he know the suspect was carrying illegally? Does he have a right to get involved? What would you do?