WM, it's part of the drug life. My daughter had drug dealers threatening her life to o, but she never told us. When she finally moved to another state to stay with her brother in his basement (wasn't the best for her, but getting out of this state was GREAT), one of her ex-boyfriends w ho was a gangster and dangerous found her best friend's e-mail (before texting was popular) and stupidly threatened to kill them both. She took the e-mail to the police and the Wisconsin police got ahold of it and he got into serious trouble. He was already on parole. But this is how dangerous their lifestyle is. My daughter knew it and got tired of it and quit. Once she moved out of state she had no car, no money and her brother is a hard a** an d forced her to walk and find a job, clean the house, cook, and basically not even light up a cigarette.
In spite of his tough rules and lack of any sympathy, she chose not to run away or to find new drug friends in her new environment and listen to her brother because "drug living is hard. I was tired of it." Chances are your son will come into contact with many who threaten him until he quits. Notice I said UNTIL...nothing wrong with being an optimist. However, I also think he should inform his attorney of the threat, although the guy probably won't ever go through with it. You never know.
Thinking about my daughter's life, which she did not share with me until after she was done with it, she could have easily gotten hurt or killed or the meth could have done her in. I was convinced she'd end up in jail or dead. I am so grateful she quit at nineteen (she started at twelve) and I hope the same realization hits your son while he is incarcerated. It's a lousy life and you do not have good "friends." They are dangerous criminals. I, like many, feel your son is safer in jail or prison where there is at least supervision and hopefully programs to help him if he wants to change. On the streets, nobody is watching. This could actually turn into a positive. Here's hoping for the best for you and for him and I do hope you can learn to deal with this and calm down before you make yourself sick.
The other forum has several parents in the place you are at and some who are learning to deal with their situation, but ALL of them are in the same boat as you are. I hope it helps you to be able to share with those who really are all in the same situation. Hugs and hand holding and a lot of empathy.