I'm not too sure, but could Jane's father be a possibility?

I'm not sure who RJ is, but the only person i have seen drink tea with their left hand is Susan Darcy in the episode "Red is the new black" when she is interviewing Rosalind Harker. I don't think RJ is a female, but i just thought i would throw that out there since i have seen a lot of theories about RJ drinking tea with his left hand.

I think RJ is Robert Kirkland because firstly, when loraline is speaking about RJ to Patrick she says,"Its a wonder you didnt become best friends from the moment you shook hands."
Moreover there is a conversation between an FBI agent and Robert Kirkland. The FBI Agent  calls a man saying she wants to get rid of Patrick and then turns to Robert Kirkland saying,"Its done."
Last point: Robert Kirkland bumps into Patrick and then shakes his hand. Patrick says,"Do I know you?"
Robert Kirkland replies,"No, you dont know me, but I know you!"
 Go on youtube and type in Is Robert Kirkland Red John, Its the First option

I have 3 POSSIBLE suspects

1) Bret Stiles
2) Agent Kirtland
3) FBI Agent who took Lisbon to the poker game

I will be very shocked if it happens to be someone in the CBI like Lisbon, Rigsby, Cho or Van Pelt.

Has someone made a research about this book?

http://i45.tinypic.com/2i0d64j.jpg

This scene is from the last episode of season 1. The cup is on a red book. I don't think this is just a random thing, but a clue that leads to red john.

its the homeland security agent

People Jane has shook hands with before season 1 up to season 3
BH(Bruno Heller ep)

Before Season 1-
-Virgil Minelli
-Theresa Lisbon
-Judge Dellinger

Season 1-
-Van Pelt(BH)
-Dr Wagner-Jail(BH)
-Preciado 
-Ben Machado-Jail
-Jared Renfrew-Dead(BH)
-A.P Caid
-Heather-Jail
-Victor Marquesa
-Dan Hollenbeck-Dead
-Randall Faulk-Jail(BH)
-Mitch Cavanaugh
-Drake Plaskett(BH)

Season 2-
-Unnamed captain(BH)2x01
-Greg Humphrey(BH)
-David
-Lillian Foster
-Philip Raimey
-Gabe Nyland 
-James Kinsey
-Jon Jon
-Scott Price(BH)
-Vic Bandino-Jail
-Madeleine Hightower
-Olivier Stans
-Cole Sylvan-Dead
-Heather Evans
-Ashley Harrington-Little Girl
-Ellis Hindon
-Andy Burnside
-Kristina Frye

Season 3-
-Gale Bertram(BH)
-Reid Colman(BH)
-Vint Molinari
-Sean Meyers
-Gareth Drucker-Dead
-Yuri Bajorn-Jail
-Walter Mashburn
-Dr Montague
-Dean Puttock-Dead
-Gary O'Donnell
-Kieran Corruthers  

Could Red John be one of these people?