This story is just difficult to process. I can't wrap my head around a kid planning to shoot someone in cold blood and actually going through with it. I can even believe that the thought would cross his mind, but to the point that he made it a reality? I can say that kids can have very fanciful imaginations, and think all kinds of things (granted I never thought of killing anyone, but I thought some crazy stuff sometimes), but it tends to stay in the imagination and it's done.
Is there anything about the kid's reaction and state of mind now?