Hi Everyone - thank you for your support and advice! I had a weak moment (before I read your responses) and called his uncle, he was in a mtg so said he will call me back. I then came to the realization after all your advice that I didn't want an update, I don't want to know how he is doing, if his life is amazing. So I put my phone off for the rest of the day. His uncle did leave me a message, I am not going to call him back though.
I don't think he knows that his uncle and I speak every now and then. That is at least what the uncle told me since he wanted me to trust telling him if I know of any other drinking episodes.
Detaching is tough - but I am working on it! Day 12 for me of no contact! I do of course hope the day will come that he contacts me and this time I can say, don't want to talk!