No, his employment contract establishes that he has been exposed Apple trade secrets and is thus legally forever prohibited from jailbreaking. Hiring him for a few months to get him to sign this and then firing him over the first thing they could, and now having him beholden to a contract in which he agrees never to jailbreak was much cheaper than suing him for jailbreaking and likely losing in court. When he was hired I had predicted this would happen and it did since it's all a rather logical thing for Apple (or any company) to do in such a situation.
