He had called the cops on himself around Thanksgiving 2017, as The New York Times reported in February.
Now it turns out his school failed to inform him he was eligible for counseling services when he asked for help around the same time.
His mother had died on November 1, 2017. His father had died years earlier, in 2004. So this was an already troubled young man who became lost and alone in the world before he did what he did.
