What kind of person shoots children and people?

I was looking at the articles in the Time Magazine whose cover is "The Gunfighters" and was thinking about this. And what I came to is to classify the kinds of people that shoot civilians here in the U.S.

1. mentally ill people
2. loners
3. people who don't have enough friends
4. people who have been bullied or abused
5. people who use legal or illegal drugs
6. angry people who could be angry for almost any reason sane or insane.
7. Confused people who might not be insane but just terrified for a real or unreal reason.
8. people who don't have enough human communication or contact

You might be able to add to this list. Because the guy in Connecticut didn't own the guns he used to kill all the children with at least 6 bullets each. And because he didn't own the guns (his mother did) then in a way she is legally responsible (but also now dead) by her son's hand.

So, from my point of view outlawing new assault weapons is not going to stop what happened in Connecticut at all because the boys mother was a gun collector and had been collecting these weapons likely since before this boy was born. Outlawing new assault weapons only would prevent people from buying new guns not used ones from individuals anywhere on earth. So, nothing in the new laws even after they are potentially enacted would have stopped what happened in Connecticut even if there had been an assault weapons ban in effect before the shooting happened.