The media only wants us to know about guns.
In a note explaining his motives Barbaro wrote: "I guess I just wanted to kill the person I hate most -- myself, I just didn't have the courage. I wanted to die, but I couldn't do it, so I had to get someone to do it for me. It didn't work out."
An article by Erica Carle on this type of thing appeared in 2003:
SHOOTING RAMPAGES: WHY DO CHILDREN KILL?
November 1, 2003