People say socially awkward introvert teen and I say its nothing new. This could have been and often is now Anytown U.S.A. I think something can be said about the fact that more and more we cocoon ourselves into a bunker of self maintained media. Almost a falsified presentation. I cannot imagine nor would I want ever be a kid coming up now because I think they have not had to fully adjust or learn personal interaction. Cause & effect in a real life setting. Action and reaction with immediate effects rather than a buffer of social media. I dunno. That's not the cause for walking time bombs like this. I don't know that there is ever one "cause" for mass murder. We don't have that convenience. He came from a family of resource and wealth but in reality that doesn't mean anything if parents had their heads in the sand or substituted guidance with money and toys. Also think that in a situation like that the authorities took the family 'status' into account and ruled accordingly, thinking maybe they were doing a favor. It really does have all to do with informed parents willing to set aside "friendship" etc.