I am the mother of a recovering addict....he is away (has been away over a year) trying to reclaim his life...it's a long and difficult journey
I now know that he was abusing in his early teens...if I knew then what i know now I would have taken action....maybe it wouldn't have helped but it might have and I wish I'd had the chance to find out....
I cannot dwell on "what if" but I sure do wonder "what if I had known?...could we have dodged this bullet?"....
as someone stated...you have about 2 years of legal control....do all that you can....I pray your son does not walk the path so many of our children are on.....