Since you're one to look up the details, look up how many active (no mass) shooters were/are on anti depressants.
Also, sociopathy is a real. Clinically, it is diagnosed as "antisocial personality disorder."
It's not considered a true mental illness, because it is not inborn and immutable the way psychopathy is defined.
"Sociopaths are individuals whose callous, deceitful behavior is shaped primarily by environmental factors,
such as child abuse or exposure to expedient behavior in others."
https://www.psychologytoday.com/us/basics/sociopathyBasically, sociopaths don't follow the rules of society which may or may not include criminal violence. Ted Bundy exhibited these symptoms among others.
"The defining characteristic of the sociopath is a profound lack of conscience—a flaw in the moral compass
that typically steers people away from breaking common rules and toward treating others decently. This
disconnect, however, may be hidden by a charming demeanor. There is both art and science to spotting
sociopathy."
Most people use the terms Sociopath and Psychopath interchangeably, yet they are not the same.
"Sociopathy refers to a pattern of antisocial behaviors and attitudes, including manipulation, deceit,
aggression,
and a lack of empathy for others."Lack of empathy applies to sociopaths and psychopaths alike. In fact, it's the one trait all psychopathic murderers share.
I think many of the school mass shootings involved sociopathy as an underlying cause. It's illegal to possess the guns and ammo on campus, illegal to fire guns at anyone unless in self defense, and illegal to commit murder. Obviously, they either do not know what they are doing is morally wrong (bad upbringing, insane, etc.), or they don't think the rules apply to them (Sociopaths).
We can academically discuss these topics forever (we already have to an extent), but unless this somehow leads to a high degree of success in identifying these types of people BEFORE they kill, it's just that -- academic.