Question comes as a kind of addition to one I asked awhile back. It was about having met a truly evil person. I can tell the story again if anyone is interested but as a young teen I interacted with a guy in the Aryan brotherhood from California several times.
Yes. I have (once) spoken to a guy who killed multiple people. He died by getting shot himself and was just a violent person in general.
And just recently I learned that a former co-worker is a suspect in the death of his partner.
Jeez killed multiple people is wild. Makes me think of the whole live by the sword die by the sword.