I do think some people are born with capacity or potential to be evil; a biological component .
Like people born without empathy and can’t feel things properly. A kid who enjoys hurting animals is a sign of it, being intentionally cruel, etc.
If “the bad seed” (seen film) grew up in an abusive (physically, emotionally, usually both) environment, I think they are much more likely to act on their evilness.
The TV series “Dexter” is interesting cuz he’s a serial killer but has a personal code that he follows.