As I said earlier, I have too little data upon which to base an opinion. My thought is that he was mentally ill (read the posts that Wolfgang has linked to), and I more than suspect he was definitely at the end of hope.

Jon, in the posts he states that he had been in some fights at school but there is no indication that he was bullied, at least that I could find. He makes reference to his "size" preventing others from picking on him.

A gun points and fires in only one direction at a time. Like a ball bat wielder, why didn't someone or a group tackle the shooter? It's been done before.

But I don't have enough data -- and I don't think I'll get it from the news feeds.