I cant help it, I feel bad for him too. he was plenty old enough to know better and while plenty of kids his age do stupid and self destructive things under stress they arent usually so terrible for another person or so life changing.
before you guys abuse me for having sympathy please keep in mind that I have a child his age that 2 years ago lost his father to suicide. now, mine did things like self harm and stealing and he's sorted himself out but I like to think the ties he has with me and the rest of his family helped him through that. this kid, treacy, had nothing of the sort. I would have yet more sympathy for this kid if it were not for the fact that he did travel a few miles and search around for a girl he had no idea who she even was, that kinda lets the "I didnt mean to even hit her" kinda go right out the window.
maybe he did, maybe he didnt, but he had lots of time to decide. and now he's got even more time to feel sorry for himself and for her.
I just feel so bad for him that he had to terribly wound and nearly kill a girl he didnt even know before his family seemed to even notice something was wrong.
this is not pure evil. this is a severely disturbed 15 year old child.
first, im sorry about your sons dad.

your sons reaction is actually typical, and is not a bad thing. the diffrence is he did not put someone in a coma due to his actions. he pretty much kept his destruction to himself personally. many people who experience trauma, whether a relatives suicide or some kind of abuse, would rather hurt themselves then other people.
imo this kid in this case took it to the level of no return. when you take out your problems on someonelse then you get no sympathy, and should get no lienency.
jmo