The creator of the show has confirmed that one of these men is, in fact, Red John.

Spoiler, Bruno Heller statement "Yes, we can trust the list Jane has."

1: Bret Stiles - Red John (has similar thinking as Jane and have the qualities required to be RJ. Explanation below)

2: Gale Bertram - Accomplice of RJ. Remember 3x24 episode? Strawberrys and Cream?

3: Ray Haffner - Too young to be RJ. He can most be an accomplice. (Rosalind Harker's declaration about RJ)

4: Reede Smith - Accomplice of RJ

5: Robert Kirkland - Dead

6: Sheriff Thomas McAllister - Could be Red John but improbably

7: Brett Partridge - Dead

Gale Bertram

In 3x24, Strawberrys and Cream Jane kills a fake RJ. Now, who knew where Jane would be? Only Jane's team and Bertram. O'Laughlin didn't knew where Jane was at that moment, he just knew where Hightower was.

So that situation was a Win-Win for the real RJ. He'd kill Hightower and also if things would go wrong, he'd put Jane on a test to see what he could do if he was face to face to him (by sending a fake RJ to the mall).

Taking the premise that RJ isn't one of the Jane's team mates, then Bertram has connections to him. In the scene where he was invited to the mall, after Jane leaves the room, first thing Bertram does is pick up the phone to call someone. So he was calling the real RJ to inform him on the situation.

Besides this, Bertram left before Jane killed the fake RJ. The real RJ was there watching the whole scene. And Bertram left before this scene. Why would RJ(Bertram) leave when he could just see his pet confronting his fake person with seats in the front row? Obviously he isn't him, just a pet of RJ.

It was hinted that he was Red John's CBI mole when, in the third season finale, he was revealed to have been nearby when Todd Johnson was burnt alive.

Bruno Heller, the creator of the show admited that the real Red John was there at the mall when all of these happened

Spoiler, Bruno Heller statement "There is a whole lot more going wrong in California law enforcement than simply Red John. Bertram is both a prime suspect as Red John, but also deeply involved in that other plot."

Bret Stiles - Helps Jane to free Lorelei Martins from a federal prison.

Crimes attributed to him by the police or FBI:

-tax and fiscal offenses

-frauds

-arming a bomb (by Elisabeth Stanfield)

-murder of Julius Coles (by David Herren)

-possible murder of Timothy Farragut (Visualize' s first guru, officially Farragut died in a car crash caused by alcohol)

-possible murder of Elliot Elswit (Sheriff investigating Farragut's death, officially suicide)

-brainwashing of followers

-possible abetment or friendship with Red John

-assaults at journalists

-threats

-jailbreak of Lorelei Martins (with Patrick Jane) who later murders Julia Howard

Ray Haffner

He's shown to be a good whistler, when leaving Lisbon's room in the Hospital. Important because Sophie Miller stated that Jay Roth (Red John) is an excellent whistler.

But he can't be RJ. He's too young to be him, as Rosalind Harker said about the real RJ.

Reede Smith

He reveals the existence of a high powered group of law enforcement operatives to Bob Kirkland, prior to killing him. It's not revealed though if Red John is a member, or if they are tracking Red John. The group uses the words "Tyger Tyger" to communicate.

If he isn't Red John, he has to be his accomplice in the FBI.

Sheriff Thomas McAllister

He's not scared of high places, like the church's deck, but he hates pigeons, and he hunts. He has pointed toe boots like RJ.

Sheriff Thomas McAllister , Gale Bertram, Reede Smith Insight from Bruno Heller. *Bruno Heller admitted that they are part of an organisation further to be revealed after RJ is caught. The reason why they gathered in Season 6 beginning was to discuss some problems inside their "organisation". *

Spoiler, Bruno Heller statement on the meeting at CBI and... "Red John will be caught"

Spoiler, Bruno Heller statement on Every suspect analyzed if they could be Red John. They all have weak and strong points, but only Bret Stiles is described without any weak points

With all of these said, who agrees that Bret Stiles is perfect for the role of RJ?