"As I sat down with each inmate, the first question I always asked was, “How did you come to be a violent person?” Without fail, every single person I spoke to was quick to respond with a horrific tale of trauma in his childhood.
[…]
If we are serious about preventing violence, we have to be serious about early intervention. We have to work together to prevent child abuse and build better mental health screening and services for younger people."
https://www.psychologytoday.com/us/blog/compassion-matters/201504/the-making-of-a-murderer