A firearm is a lethal weapon. People have died from being shot in the leg (Sean Taylor). If it is used, it should be used to stop the person who poses a threat of bodily harm to yourself or others. A person who is retreating, carrying property is not posing a threat. I would not hesitate to use lethal force to defend my life or the life of anyone in my family. However, I would not use lethal force for someone running away after stealing property. To do that is committing a crime, even if you are good enough in a situation like that to shoot to wound. It is not self defense.