Horrible tragedy. It seems like it happening more and more. I live in Portland Oregon and someone just lost it in a mall and killed 3 people two days ago.
While I wouldn't say video games are a direct cause, I would like to see everything on the table. Like; mental health care, gun control, all media (including games) , and so on. I don't think it as easy as blaming video games or banning guns but more of a social / society issue.
It just a horrible thing to happen.