Originally Posted by willravel

There's plenty of blame to be assigned, and there are no absolutes outside of maths. First and most importantly the blame lies with the killer. This person is directly responsible for his or her actions, and there's no denying that. The problem, though, is that the blame does not lie 100% with this person. I'd say 70%, but that's just a random number intended to suggest that while the killer has the majority of blame, he or she does not have all of it. What caused this behavior? Why does this person think it's acceptable to take someone else's life? Why was his or her behavior not curbed before becoming so severe?

These are all questions to ask in order to prevent this from happening again.