Here is the literal definition of a serial killer, I was surprised by a few things criteria wise.
https://en.m.wikipedia.org/wiki/Serial_killerSince anger is in there I bet a shitload of buttons and associates could technically be thrown in
Technically a serial killer is a person that killer more persons even a marine or a green berrets can be technically a serial killer; the different is that berkowitz aka the Son of Sam see a black dog that order him to kill, a mobster kill for money and/or because ordered him to whack a guy and if they want can stop killing while until get caught a serial killer can't stop killing.
