I have a cousin who was hit in the head with a baseball when he was 8. When he woke up he was different. His personality and decision making are just off. He slapped his girlfriend one night and then realizing that he’d violated his parole decided that instead of apologizing he’d have to burn the house down to cover himself. Luckily the neighbors intervened and the woman is fine but I’m just waiting to hear that he’s been arrested again.