Watch for the starts of hostility. It wasn't until after the poor kid was beaten by his father that he became...damaged. The thing with that, it could've been brain damage. Or it even could've been effects of the event itself. He forgot his father existing, but the event still happened. His brain knows the event happened. It's trauma. There's just no longer a person to match to that trauma. He probably never went to see a therapist. His innocence was stripped away when he was just old enough to start really remembering.