Would make an interesting research document as to how many shooters had drugs in their systems when they attacked and what kind.
Straight out medical survey. The results couldn’t be tampered with if an outside medical research group is hired to do the tests and publish the results.
Could provide an important clue as to one factor involved in these shootings.
Do t forget about prescribed psychotic/ mind control meds.
They’d have to catch the perps, first.