If you saw the pics of him at home, he was holding the Glock in several of the pictures. Also a .45acp revolver is somewhat rare. I can think of a couple of manufacturers, but you just don’t see many out there.
I'm a little puzzled about this "loaded repeatedly" quote, but I'm not interested enough in the minutia of crazy to chase it very far.
I suspect that he was simply a very poor shot, like all leftists and a lot of conservatives. (Experience shows that watching movies is no substitute for range time.)