Diane, our HP often works in very unexpected ways. Just the fact that he called you after 27 yrs. and has been there, done that, I'd give AS his number. Then as everyone else said, the ball's in his corner. At this point, it can't hurt. If AS was doing well, I'd say, don't mess with a good thing, but he's not.
Very strange...you had no clue he was an addict during that time? Hoping and praying this might be a good thing.
Love, Barb