It wasn't a shotgun that did that, it was razor wire. He was a convict who tried to jump the fence and left behind more then he bargained for. Look at the way the skin is around the wound. Its torn, not blasted. Besides, if it was a shot gun, why would the pellets tear off only that chunk of skin and not harm the heart? Did they just vanish as they penetrated?
I agree,if it was a gun shot there would be burn marks. Good post though