They have to charge the guy--he committed homicide. It doesn't matter what the kid did, assuming he did anything at all, you CANNOT shoot an unarmed person and claim self-defense. By law, that is a homicide and you WILL be charged.

Well, that's how it is up here in the North. Down South. where I thankfully no longer live, you can kill anybody you want as long as you're a good ol' boy and anyone who says I'm full of shit is full of shit.