There is no way we can help, i don't know why you are asking help here anyway. I would actually just kill the dude with my gun if i knew the kid was in danger. Just call the police and report it, as many times as you have to. They can't just ignore you, right?
Besides i think you're trying to make a joke, in which case i'm happy there is no kid being harmed, but i still hate that people like you find this kind of jokes "funny".