Study on whether psychotropic drugs increase the risk of psychosis. I’ve heard it suggested that even if the drugs don’t increase the risk of psychosis in and of themselves, they help people who do develop psychosis stay at a high enough functioning level to be able to plan and execute mass murders.
It’s an interesting question for researchers to explore. I tend to blame the media environment for encouraging mass killers. If you ask me what the independent variable is, I would offer that up. If the 24×7 cable news cycle wasn’t enough, social media might just have made it worse.
The big issue those who want to blame gun access is that gun access in this country has never been more restricted, and school shootings were unheard of in the era when kids took guns to school as a matter of routine, and guns were far more readily accessible to kids.