Such a hard "row to hoe". Hard for everyone concerned. I have prayed for your prodical. God is so good and it is not over until God says it is. Your son needs his family and the family needs God. Pray without ceasing...try to remember how God has been faithful to your needs in the past. It is not easy when the enemy is trying to take a son....been there with good ending for us....fight, fight, fight for him.
God bless.