Not everyone realizes they have a problem before they have done damage.
If someone has extreme anger issues to the point that they're physically harming people and destroying things over small miniscule inconveniences, I'm pretty positive his family/school/peers/etc. would've noticed. This isn't some 40 year old loner who lives by himself with his girlfriend, where only the girlfriend would notice his outbursts. He's a younger man who spent most of his life with parents and in society. Behavior like that would've been noticed and treated early on from school. I'm not doubting he has anger issues, I'm just not justifying the whole "he did it in rage because he can't control his outbursts" rhetoric. MOO