A stranger is a guest-of-a-guest at a barbecue. That person then becomes violent.
According to [the homeowner, Dieter] Meyer, the stranger became belligerent, pulled out a knife and threatened Meyer's girlfriend on the front steps of his home. Meyer said he was frightened for both his and his girlfriend's welfare.Self-defense is a human right.
Meyer, who holds a concealed weapons permit and always carries his gun, grabbed it and fired several shots at the man.