I think what Tango is alluding to, Cav, is...If the Dad thought he had a gun or not.
Plus, if some kid walks into your house with a gun stuck in his belt, what are you going to do?
But, not to let this get out of hand. I'd like to point out, once more, that we only have the general description of the incident from Law enforcement. It does not state anything other than the basic facts of what happened. We do not know what things might have been said, we can only postulate.
The kid was hispanic and 19. That is all we know about him at the moment.
Let's see what else we can find on the story before the Dad is guilty until proven innocent.