Great job! That is all you can do at this point. You are right, he is in the care of the right people right now, his attorney knows the situation, and he is in the drivers seat of his own recovery, or lack of, that is his choice.
Now remember to take good care of you!!!! Do you have face to face support in your life? This may be a great time to check out Alanon or Celebrate Recovery for support for you.