Being locked up in a detention center is very uncomfortable. It's no use worrying about it. This is beyond your control. Sit still. What you can do now is to calm down and see what the lawyer says. Contact a lawyer for everything! It is understandable that you are anxious at this time. Just wait for the notice. You should also discuss it with his parents. I think if his son is caught, they will not sit idly by like cold-blooded animals. Maybe they regard you as their son's savior, and some people will certainly "rest assured", so the cost of hiring a lawyer will still be taken from his parents. Talk it over. If he doesn't give it, he has to go out first. How much will it cost him to wait for your husband to come back?
It will be very hard inside. I think so. The detention center allows you to visit him. You should try to comfort him. Besides, you should ask him if he has broken the law. You must never do anything under duress. If it is really illegal, you can tell him that you will wait for him and never leave. I think you should be able to write the words "husband, I am waiting for you", which is his support and comfort. The law is nothing more than human feelings. I hope.