Regarding Columbia U. interference-study that only 11% of mass shooters had lifelong psychosis.
I think the definition of a mass-shooter as killing 4+in one event is decent, it rules out a lotta gang-bangers since those events (practically speaking) only claim 1 or at most 2 at a time. This is a specious study tho bcuz lifelong psychosis isnt the same as temporary side effects of drugs (like lunatic-pills)
I strongly suspect that lunatic-pills are one of many factors in the increasing prevalance of mass-shooting chimpouts. I dont expect any serious studies on this however since theres no money to be made in gettin people offa lunatic-pills.
This broken ZOGbot (aka the "NAFO shooter") who kilt all those people in the bowling alley was 40 years old when he started hearing voices which is a cardinal symptom of psychosis. Its very rare to suddenly become a psychotic in middle age, this sort of thing almost always manifests in early adulthood. Lunatic-pills side-effect? Mayb.