From the latest episode we know that Haffner knows about the "Tyger, Tyger" group, at least we presume so. He says that PJ didn't only pissed off a lot of powerful people. Also, that should rule him out from being in the "Tyger, Tyger" group, why would he talk about his secret group in the open? Also, to the people questioning why did RJ hire the private investigator to bug the office, RJ always gets someone to the dirty work for him. However, not in the "Tyger, Tyger" sense, nearly all of the people who do stuff for RJ end up dead pretty quickly, either by committing suicide or end up killed by RJ himself.

What I think will happen in the next episode, is that RJ won't be revealed. We can see in the promo that PJ has all of the rounded up in a room and ready to shoot whoever is RJ. Too easy isn't it? We wouldn't be able to hear his story etc. I reckon, he will ask them to show him their shoulders looking for the three dot tattoo and IMO either all of them will have it or none of them. This will leave our favourite forensics expert Brett Partridge. Until, this episode I was convinced that RJ is Haffner but something doesn;t seem right now. I reckon there will be some sort of a plot twist following the scene shown to us in the promo for the next episode.

Brett Partridge is probably dead, and was a member of the "Tyger, Tyger" group. However, I just can't see RJ being exposed so easily, in a room full of other suspects. Something will go wrong with Jane's plan.