I've thought a lot about this. I'm in a position where that's not something I have to do. But for me, the person broke my trust, even though he didn't know he ever had it. I personally can't ever trust him. As a personal safety issue, to protect myself, that's the way it is. Perhaps he hasn't broken the trust he has with his friends. And if that's the case, he's lucky. But ... trust is a big deal for me. And in my experience, you can try but you there are some things you can't earn trust back for.