Sadly, a lot of our psychotic mass-murderers have been under treatment at the time or until fairly recently before their acts, especially the young ones.
I think the threshold for notification and action may be a little too high. In some cases, the families of the young men were even trying to get them committed to residential care because they knew something was about to break...but the psychiatrists would say, “oh, he’s just fantasizing,” and refuse.
How much do you wang tibet me that was the case with Holmes?