Number one, this kid should have never had access to the guns and ammunition in question. His parents should have had them under lock and key or in a gun safe. Number two, what motivated the kid to take the guns and ammo to school with possible intent to shoot people. It is very disturbing to know they found the picture in his desk of the school and dead bodies. The kid is obviously crying out for attention, even if it is negative attention. Maybe his intent of was to kill and then end his own life. He sounds like a very disturbed young man. I hate to see a boy that age arrested, but that hopefully will be the first step in getting him the professional help he needs.
This took place at a "Christian" school. Perhaps they need to go back and revisit the ten commandments with an emphasis placed on the sixth commandment.