(((cherrie))) Wow, that's a tough one. He's been thru a lot already at 24, hasn't he? I'm so sorry.
I have a hard time being angry with addicts. I really believe that it's a disease and that willpower has very little to do with whether or not they are able to stop....or had any bearing on why they started at the beginning. It's like the counselor told our family -- my son was just the "lucky one" to be hit by the addiction bullet.
There's no easy answer, that's for sure.
Your son is in God's hands and He will provide what is needed for his growth.
I hope you find serenity -- just for today...