I ran across this in my gogle-fu, and is an interesting watch. It's from 1982, and I will warn there is a "anti gun" message at the very end (not Michael Morrish), but it does offer insight into mass murders, serial killers, etc. Note the length: 1.5 hours.
Edit-there are graphic parts, so keep the youngin's away.
Nuts will always be nuts. The difference is the tree they fall off of....