I recommend checking these videos out, they discuss the effects of child abuse on the psyche and the physical changes in produces in the brain. I scored a 9 on the adverse childhood experience study he mentions in the first video.
The True Roots of Human Violence
The Biology of Human Violence: The Effects of Child Abuse
The Death of Reason: The Effects of Child Abuse
The reason I didn't link to part 2 is because its very long and the audio is not as great as these three videos.