The problem with your hypothesis is that it is only troubled individuals that commit these sorts of crimes. As troubled individuals virtually all have access to drugs that are meant to help them, it is natural that the people who commit these crimes will have used some of those drugs.
The problem is that we cannot separate the cause from the effect. It is equally possible that the sort of people who commit these crimes are going to have used these drugs as it is that people who use these drugs are more likely to commit such a crime.
My Hypothesis comes from the medical records of the Killers in question, the only deviation from this is one of the Columbine shooters who had his medical records held by a judge. The troubled individuals in question all had a doctor prescribing them big pharma drugs.
This is not my opinion, this is a medical fact. proven many times over, based on police records.
The majority of the mega insane killers, have been on the big pharma drugs, period. I’m sorry you missed all of their detailed adds, that provide the warnings. You could go to their web sites and read them as well.
Sorry, none of the mass murderers were stealing drugs!
Do some home work, it’s not hard!