TellingTruths is correct, in my opinion.

Brett Patridge was RJ (a serial killer getting too much attention) but is now dead.

Partrigges also was simply only a member of the TT group not the head (Partidge was in law enforcement)

This posed quite a problem for the TT group, it is because of Patridge's actions that the CBI now has the mighty PJ looking into any murders in TT juristiction. 

Bertram wanted Patrick to figure out that Patridge was RJ and kill him (that is why he sent PJ and Lisbon to the desert- to see Partridge),

When PJ failed to make the connection, Bertram had Patridge killed.

Patridge having been RJ would explain a ton.  (see other posts on Partridge)

However, PJ will now confront Bertram, the head of TT.

In PJ's mind Bertram is just as guilty as RJ because it was under Bertram's watch that the TT let RJ (Partridge) kill his family and now he must die as well.

Just trying to make sense of this all. 

Not perfect but maybe getting closer'

AUGH.......

With the list ever dwindling, it is quite obvious that RJ is Bertram.  Outlined below are my reasons why.

1) It all goes back to the end of season 3 and revealing the Mole. Heller said we would see RJ face and if it is Bertram then that statement was accurate

2) revealing the mole actually proves Bertram is red john as well.  Betram and Craig O'Laughlin (COL)  are both suspects  as the mole and hence both told different room numbers where Hightower is staying. COL tells Bertram what he knows  and thus he realizes it is a trap.  He knows how smart Patrick is and he will figure out the reason the hired hit man has the rope. Therefore Bertram sets up COL and thus takes the focus off himself at the same time. 

When meeting in the Food Court, Timohty Carter is called in to be "red john"  and have Bertram's back. Otherwise how would he know to be at that exact place with a gun....  COL couldn't have told him cause he didn't know Bertram would be there. 

3) Moving to this season, the reason he doesn't kill Teresa in the opening episode is quite simple.  The Jane - Red John dynamic is all a delicate game of chess. Bertram knows the kind of relationship Lisbon and Jane have (review the Jane-Bertram conversation in S4E2) and if he kills her, he is not sure the effect it could have on Patrick. If it takes him "out of the game" so to speak like it did when he killed his wife and child, it ruins the relationship RJ wants to have with Jane.
 
4) Bertram has told Jane he wants to be there when he reveals RJ - why?  Simple, it is the final move in their game of chess. If Jane is right and confronts Bertram.. he wins the game. If Jane is wrong and confronts someone else, RJ wins and Bertram is there to live in his glorious moment.

SPOILER AHEAD




5) Rumor has it that starting in episode 9 after Red John is killed, the story moves 2 years in the future. There's been a thorough house cleaning in California Law enforcement as a result of the vast conspiracy led by Red John. . What could cause a bigger fallout than a notorious serial killer leading the California Bureau of Investigation?  It all points to Bertram.....

anyway that is just my take on it... I would be really surprised if it is anyone else other than Bertram...

Just sayin' that Bertram is the only 'suspect' in the cast to the 6x08 (Red John) episode.

http://www.imdb.com/title/tt3196216/fullcredits?ref_=tt_cl_sm#cast

I think it's pretty obvious Heller is lying about many things. He said Red John is someone, who has been there from the start. On the list of 7, only Partridge and McAlister have been there from season 1.

So, Partridge is dead, Sheriff has to be RJ, or is he?

Bertram was introduced in the third season and that is not "from the start" in my opinion. Smith came into the series 2 years later in season 5. Then there's Kirkland, who has been introduced to us last season. Stiles has been there since season 2, if I remember correctly? Haffner also became a part of the show in season 4.

The list itself doesn't make much sense then. And I honestly don't believe it. I still think, RJ will be one of them, but Heller wants us to think that the list is fake.

My favourite from the start has been Sheriff, because he has been there from the start, smells things around him extremly good, is a great shooter and walks like a hunter, quietly. Also, his job wouldn't limit him doing all the killings.

But I'm not sure anymore. When he revealed the three dots tattoo, Patrick aimed the gun at him and he said "It's not what it looks like, I'm not Red John." I don't know if I think of RJ too highly, but RJ wouldn't said that. He wouldn't lie to Patrick's face.

Bertram looks like a good option right now. He didn't say a single word when he revealed the tattoo. He always carefuly chooses his words when he talks, we could say manipulatly.

Some things we already know also point to him. Heller said at the end of season 3, we would see Red John in the season finale. Bertram was there with Patrick, but left before the whole PJ - Carter dialogue began. Everyone thought Heller had Carter in mind, when talking about you're going to see Red John. What if he meant we're going to see Red John because Bertram was there?

Bertram also said in the first episode of season 6 to Lisbon and Patrick: "I am many things to many people." I think this sentence has a deeper meaning and we shruged it off to quickly.

Also, the first impression is the most important one. Patrick didn't feel good when he met Bertram. That is something to point out.

It could honestly be anyone, except Smith (IMO he joined the show too late) and let's hope we get an explanation about everything we want to know. Because there are a lot of things I am curious about!

Also, the "he is mar" is written straight. If the victim really wrote it, it would be at an angle because that's where the arm would reach. But then, this is tv and not a real homocide. (Thank Goddess)

When PJ & Bertram first met in 03x01 they shook hands on camera and
Bertram called him 'boy wonder' which is kind of weird because how
should he know about Janes nickname from the past.
Also Jane talks about having a bad feeling when it comes to Gale Bertram.
I
don't really know why but Bertram has always been making me feel like
he is suspiciously unsuspicious. I really like the idea of him being RJ
because at least the season 4 finale with him giving the important
'rope' hint would make sense.
Let me know what you think about my opinion :)

SPOILER** SPOILER**

It is reported that some countries in Europe have gotten access to episodes 7 and 8!! Bertram is revealed as Red John. Jane has his back turned and hears Red Johns voice. When he turns around, Bertram is staring at him while holding a linoleum knife. Bertram starts laughing at how he brutally murdered Janes family.

Jane kills Bertram only to have the Tyger Tyger organization cover things up.