I'm sending hugs too, Moose, this is the scary part and it's hard to be a mom and let go when we are afraid for them.
Mental health and addiction recovery go hand in hand here in Canada and they clearly recognize the need for treatment of what they call "Concurrent Disorders" meaning addiction and mental disorders combined (and at this point they don't worry about which came first, they just treat both sides).
That said, the jails and prisons here are just as bad as where you are. You'd think that if the idea of incarceration was to rehabilitate them that they would offer adequate rehabilitation facilities and care. I think the time will come here where jails will work with outside services to get the help for the prisoners who really need it, but it's a slow process and doesn't help those imprisoned now.
My prayers go out for your son, Moose, that he can get the help he needs. And special prayers for you and Mr. Moose, this is no picnic for either one of you.
Hugs