Even Lanza, while having 2 seemingly successful parents, also had 2 parents who didn't live together.
I don't recall the back story to the Columbine killers' families. Were their homes broken do you remember?
It could have an impact, but I still think this stabber in PA was probably some sort of mentally ill.
"We ain't a sharp species. We kill each other over arguments about what happens when you die, then fail to see the ******* irony in that." - Justin Halpern
The question we should be asking, is if the kid was on antidepressants?
This seems to be one of the common threads in these types of attacks.
We should also look at the time line, if this attack was done in 60 seconds, that's one thing,
but if this went on for several minuets, we should question what kind of sheep we are raising?
Dr's are reporting that most of the stab wounds were to the right flank of the victims abdomens.
So the attacker apparently knew to go for the Liver, ( or he was left handed ) which is why many of the injuries were classified as life threatening.
Liver lacerations can cause acute and life threatening blood loss.