Since I first saw the 11th episode from season 1, the one when that guy asks Jane to prove he is innocent in a murder case in exchange of telling him who RJ is, i always had the impression that the whole "HE IS MAR" thing has nothing to do with RJ. Jared appears to be pointing at the prostitute he was with, which is, in my opinion, a man. I swear that, when I saw the scene for the first time, I said "damn, that prostitute is totally a man". Look at her again, and tell me what you think. But concentrate on her face, please :). So I thing the message was "HE IS MAN", meaning the prostitute was a man. Maybe RJ wrote it himself. Or maybe Jared did, and even if he was reffering to the hooker, maybe this is, somehow, a clue about RJ. I don`t find the connection, maybe there is one.