Sounds like it's too late.
You say that these events occurred in "the 80's", so that would mean no more recently than nineteen years ago, If you finished an AA degree before these events happened, you were, probably, an adult before any of it happened.
There's a statute of limitations for any such claims, and adults don't have any "tolling" provisions to "stop the clock", unless they're mentally or psychiatrically disabled.
That is certainly a tragic and nasty story, and it is obvious how much harm he did you, based upon your still suffering anguish over it after 20 years, but I am sorry to say, I see no basis for any legal action at all. Whatever rights you might have had on this problem, they expired long ago. I would suggest instead getting counseling so you can somehow let go and move on emotionally. This is a good example of how sexual abuse is the "gift that keeps on giving", as it is passed on like a disease. Lastly, even if you could sue now, you would only be re-opening the wounds and harming your reputation.