Snake bite caused sociopathy?
So I have a 2nd cousin who got bit by a snake when he was a kid and almost died since it took a long time before getting him to the hospital, but thankfully made it. We're adults now and since he was a teenager has been kind of a trouble maker and now he even hits his wife and kid and other criminal activities.. he seems to have narcissistic/sociopathic tendencies and some people in the family sometimes mention that it might be the devil that got inside him through the snake when he was young but of course as an atheist I don't believe all that nonsense.
But is it possible for brain development to be affected/stunted due to snake venom just like stress and abuse does to a child's brain which manifests as mental illness in adulthood? But I'm not also sure if he had any traumas in the past or just has a strong genetic predisposition cause all his other siblings turned out "normal", anyway just wondering if snake venom also plays a part in brain damage which manifests in future mental illness.. couldn't find anything on google or maybe didn't search enough but just wondering if anybody here knows something about this.