Meh, just about anybody can get nasty as hell.
I was prescribed it a long time ago for high blood pressure, didn’t do much of anything.
At any rate, even the authorities, who would sure love to find something to pin this on, said it wasn’t a factor.
The the odd thing, following the mentally ill route on this, is that there doesn’t seem to a trail of things you’d expect to find in such cases - a history of meds, treatments, hospitalizations and the like. Doctors love to treat those who can pay easily, where money is not a problem.
As I said, if the motive behind this is just mental illness, it was brewing for a long time and he hid his psychosis pretty well. Which could likely be the case.
Willful wickedness can result in mental illness