I really feel sorry for the kid. He's grown up with nothing but abandonment and pain. How great a person do you think his grandmother is? Look how her kids ended up.
Of course, he is responsible for his actions and needs to be punished, but I don't think a few years in "crime college" and another dozen ass-whuppins is going to do it. He's doomed without a mentor he can respect to teach him how to be a man. He probably won't get one. In that case, hopefully, he won't breed, and won't take anyone out with him when he goes...