As a matter of fact, I was just reading an article yesterday reporting on the statement of a professional group of psychiatrists warning that mental health professionals don't have crystal balls.

It seems that schools are referring more and more students to psychiatrists and other mental health professionals when they're worried about violence.

But this group of psychiatrists is trying to remind society that psychiatry and psychology are not predictive sciences. No medical professional can interview a person and be even close to certain if they might or might not become violent.

Nobody seriously believed this kid was a violence risk. If people at the school sincerely feared violence, they wouldn't have let him remain that day. There are procedures in place for that.

But he did become violent, and now prosecutors are trying to blame the parents. Responsibility is shared, however. It's a societal problem, not least of which is easy access to guns. Gun culture.

If everyone in the United States who did the sort of things these parents did went to jail, there wouldn't be a whole lot of parents left free.

But what they did most certainly did not "cause" the shooting.