You can fan the hammer on a SA revolver but only if the trigger is held down. So there's no way for him to have kept his finger out of the trigger guard and fired the shot unless there's something really wrong with that gun. Well, guess what? They HAVE THE GUN! Now that he's opened his mouth they can test its functions. Either he's telling the truth or he's put himself in a trick box, and I know which way I'm betting.
Rest in peace Muggsy
"Individual Muslims may show splendid qualities, but the influence of the religion paralyses the social development of those who follow it. No stronger retrograde force exists in the world." Winston Churchill 1899