Someone put it in an earlier post, but I am going to say it again for you. Transparency! If he is willing to cut all contact as he says, he has nothing to hide. There should be no lies, you must insist that he give you passwords to all accounts for e-mail, texts, any means of contact. He may see it as untrusting, but if he is willing to repair and rebuild, than in should not matter. A 100% no contact with OP must be enforced.
