Bran, those phone calls don't sound like someone trying to contact your daughter. Besides, surely she would have known she was unlikely to be going home? If a girl wants to get in touch with a guy, REALLY wants to get in touch, she is unlikely to give a number where she may not be reached. She hasn't been home for a fair while now, her instinctive reaction would have been to give him a number where she's been staying, or a friend whose mobile phone is likely to be nearby.
No, the only reason she's given anyone your home number, is so they can directly harass you. They're doing her a favour, she's probably asked them to do this to "soften you up".
Mind you, they would be empty threats. I certainly wouldn't allow yourself to feel afraid of them, but they DO need to be reported (which you did - good for you!)
If nothing else, he needs a rap over the knuckles to not do this sort of thing just because a girl asked him to. If he's still such an idiot that he will do this, then he deserves more time if that's what it takes. He and his possible problems are NOT your responsibility in any way. Don't let yourself worry about him - worry about yourself. NOT taking action is letting him think that what he is doing is OK.
The other possibility - he may not be someone she passed in the courthouse who she asked to harass you; he could be someone she owes money to (or worse than money) who is trying to 'collect'. It's unlikely she was picked up in isolation. Yet another reason to call the cops. If she has told people to go to you to pay her bills, you need to send a clear message - you are not responsible for her actions.
If this is another underage kid in jail, then the very least he needs is to hear this message loud and clear - "you will not get anywhere calling this family. All you will get is trouble. Send the word to all the other inmates - these people WILL pass all calls on to the police and will press charges."
I've said before, my sister went through this. And when her son was out of jail and living with his girlfriend nearby (and apparently trying to go straight) my sister kept helping them by giving them various things. My mother moved house into a retirement unit at about that time, leaving her house on the market. My sister gave the washing machine to her son. Gave him the fridge. Gave him beds. Lots of stuff. We were staying at my mother's house at the time, we got back form an outing to do some washing, to find the washing machine gone and were very glad we hadn't put a load on to wash while we went out! Although my sister had my mother's permission, I felt she was just feeding her son's drug habit;we visited him a few days later and there was no sign of all these things, he was hocking them to pay for more drugs. I was angry with my sister; I understood she wanted her baby grandson to at least have access to a laundry for clean clothes, but by making it too easy for her son, he wasn't learning anything about how to be a responsible father. He wasn't yet ready to appreciate these things, he was still taking it all for granted and the more she gave, the more he drained her dry. In his life he had yet more time to serve in jail, before he learned how to get his life back on track.
My sister knows better now. She is still in touch with him but she no longer bails him out by giving him stuff. She has nothing left to give, frankly. She just about bankrupted herself for him, paying bail which he would then skip, only to get caught eventually anyway. Meanwhile her other kids were left needing help and they WOULD have appreciated it.
Why is it that we expend so many resources on the ones who least appreciate it?
Marg