Will you people ever get it ?! Brett Partridge IS NOT RJ ! Your clues are :
1) His voice sounds a lot like RJ's voice - yeeees, the creators would allow you to solve the greatest mystery of the show that easy,by comparing voices.
2) William Blake painted A brace of partridge - riiiiiight, Patrick and CBI team can't google all about William Blake - only you fans can, because you are just that smart. This is by far the stupidest clue about RJ. Who ever started the ball rolling with this explanation, deserves to be forbidden to think. All that is important is the poem The tyger,and it ends there.
3) He appears when RJ copycats strike - yes, but because he is a tool in a box which real RJ uses. RJ is very powerful,wealthy,smart,persuasive - Partridge is a weak person, anti-social, a freak. He could never assemble and establish contacts from all walks of life. And finally, his age excludes him.
PJ being RJ is also stupid,so it is not him. Every theory stops with Rosalind's description of RJ - straight hair,rough hands. My initial guess was that Alex Jane is RJ,but where does he come up with finances and connections ? That theory also bites the dust.
Like O'Laughlin was RJ's FBI connection - Bertram is his CBI pawn. Bertram is not RJ,nor is Minelli. No one from CBI is. Stiles is not RJ, and also Laroche is out of the running.
RJ is not a woman. Kristina Frye is not RJ, but she knows him. That's why he didn't kill her and that is why we will see her again. What I think is a real strong possibility is - Rosalind Harker is not really blind. The way RJ brought Kristina to the state where she thinks she's dead, he did that with Rosalind and blindness. I really think that's how things are. And I am sure we will see Rosalind again.
The writing on the wall was not He is mar,but He is man - unfinished He is many. So it is not Ellis Mars. First of all, no one would write He is Mars. It would either be just Mars or It's Mars. But since Ellis appears way later in the show, name Mars would mean nothing to CBI and Jane. It is not Ardiles, it is not Molinari, not Harken and most certainly not Mashburn. And after seeing that list of suspects in Jane's book, all of my attention is reserved for one name - Towlen Morning. Deceased ? If Jane is questioning this, he thinks that report confirming the frozen body was that of doctor Morning was a set up. But he has done nothing about it since that case,not even the smallest investigation. And that is why I will re-watch all the important episodes,but this time writing everything down and closely looking at every scene,every little detail. Making my own RJ dossier. And I am pretty sure I will figure out who RJ is.