Let me try writing that in english.
So, in my opinion it is possible that we have more than one RJ. Rj himself is the original but when he notice that Jane is close he search for helpers. Guys who give him an aliby when he need one and every time when Jane comes too close to one of the fakes RJ kill that one just for the case Jane find him and asked to much or the fake tell someone about the situation. Noticed: first Jane focus on Partridge an voila: dead. The next episode, jane has a hard suspicion in, was about Kirkland and he died to. (Tyger but maybe work for RJ ?)

I can imagine that each of that 7 suspects die exept RJ.

What do you think about that?