welcome to sr, glad you found us but sorry to hear about your son. my husband and i both are recovering addicts and i think that you did what you had to do. my family did the same for me and so it was for my rah. today, i'm a few yrs sober and my husband is only a few months clean,i think. anyway, i know how much it hurts, and i also know that it takes a lot of strength and courage to do what you did. in my opinion, it may have been the most loving thing that you could have done for your son. it may just somehow drive him to his bottom in turn, saving his life. keep posting and maybe find an alanon or naranon meeting to attend if possible, they really do help a lot.
good that you at least know where he is. take care of you now, addiction seems to effect all who love the addict. keeping you and your family in my prayers