Yeah. I've contemplated becoming a lawyer before, and it's not their fault that the system allows this to happen, it's the legislation.
Also, he shouldn't have taken the gun to the bully's house. I've never been in a situation like that, and hopefully never will, so I can't fully understand the stress and fear that must have overtaken him, but that was still the wrong thing to do. After going to the school office multiple times, couldn't he see that they were doing nothing? Why not call child services? The police? You should go to the higher authorities in these types of situations.