 It appears that he was socially isolated through school, according to the reports that are coming out, which is also quite common. What we don't know is if he fits other patterns. So, for example, if he was showing warning signs, if he was in crisis, if he was leaking his plans or telling other people that he was thinking about this. But just based on the early reports we have coming out, he does seem to fit this general profile of a public mass shooter.