So that means your daughter was 12 when he came into your life. Sorry to think that he may be a pedophile that has taken advantage of his situation. I'd be taking a long hard look at the memories I would have about he and my child. Was he inappropriate at all? And if I thought so, I'd call the authorities and a good lawyer. I think I might even sue him for alienation of affection from my daughter.
IDK, Im probably rambling here, but I am soooo damn mad that I can't think straight.
I wish you the strength you will need to get through this horrible, horrible situation.