One more thought:

Maybe Bruno Haha Heller, did the shitty "Sherrif is RJ" episode, to loosen the hype on RJ we all have been making for these years.

Besides, it is possible that Sherrif isn't real RJ, and was being pussy because he was "forced" to be fake RJ, and just didn't predict that Jane will beat him, just like with rock, paper, scisscors game. He couldn't have told Patrick that he is not RJ, because even if Patrick would spare him, real RJ would gutted him anyway.

Conclusion: Bruno "left" the opportunity that someone else (probably Partridge) is RJ, but for now, to bring the tension down he did another red herring.

It doesn't change the fact that its weak to copy "The Profiler".