Heartstone:
If your son was sentenced to 5 years, he'll probably do 2-1/2 years. That is if he has good behaviour.
In this time hopefully he'll take advantage of all their programs. I don't know where you live, but I know my son not only got his GED, but HS diploma as well. He also attended the NA meetings.
I remember when he left, I cried so much my eyes were sealed shut! That was the first time. After that I knew he'd be ok. I was sad, but relieved. He said it wasn't as bad as county jail. I mean it's not a place you would volunteer to go to, but if you haven't a choice then got to make the best of it.
They put them in minimum security too!
Now is your time to get the help you need so when he comes home, you'll be much stronger too.
Hugs, Devastated