Hi Lee, based on his response that you wrote above, I think that he probably is remorseful. I don't know how old he was at the time and how old he is now but time and age does change us. If he was an adolescent he couldn't appreciate how bad a thing he did. Not saying that his actions should be excused but I hope that a lot of younger abusers would not have done what they had done if they had an idea of the effects on their victims.
In my case my abuser was an older friend. Maybe three years older than I was. While he had to know it was wrong but likely couldn't appreciate the damage he caused. (I hope he dies a horrible death for what he did to me and others. Forgiveness for me is not an option.)