Well, first of all, Kirkland uncovered Tyger Tyger, as he told Smith during the RJ investigation. He told him that it was a corrupt group within law enforcement. Smith probably told the powers that be behind TT about Kirkland and they had to get rid of him before he blew the whistle on them. Kirkland tipped his hand to the wrong person.
Haffner could have been part of this when he was a CBI agent. Haffner could have reported information to Stiles. However, I still think TT is separate from RJ. Red John could still be part of TT though because all of the men on the list are law enforcement except Stiles. What better way to get information and form "high level" friendships? So if all of the men have the tattoo that means they all belong to TT. I think they won't all die in the explosion, that would be stupid on the writer's part. I think maybe one will be "missing" from the explosion, maybe Patrick will be also, chasing RJ, and the person missing will be RJ. I also do not believe anyone dead is RJ nor is any member of the Team. Now, are they TT members? Maybe. But RJ is someone on the list. Heller would not alienate a fan base to lie to them so blatantly as for RJ to not be on that list, if he did it would really surprise me.

There is a strange idea in my head, I want to share it.

prolog

Currently we assume that Red John play with Jane his pervert games to have more fun by murding others. The classical reason for a high-level serial killer who wants a strong enemy.
There are a lot of movies or series like good vs. evil. (e.g. Homes vs. Moriaty) I don't think this series just use this old - in the past good working - pattern.

In my eyes, on this point we all were screwed. I think there is a big plot behind the scene. An organisation, which controls private companies and public institutions to rule behind the curtain, is the main bad guy at this show. This fits perfectly with symbolics and code words like "Tyger, Tyger". In our history there a lot of examples like that. (especially the use of christian methaphor)

I don't want to argue again the specific bible lines (apocalypse) or hints (like he is many), because in this board are a lot good explained theories. (please read them to accept that there is more than one bad guy)

main chapter 

Maybe I am totally wrong, but... What if this organisation identify Jane as potential risk for their "work"? He was a public man with a lot of intelligence. You can't kill someone like him easily. But an organisation of such a kind could keep him busy on another "focus". They make it personal to Jane and use Red John to murder his wife and daughter. (rage makes him blind and stubborn, at that point he got distracted)

You will doubt that Jane wouldn't be killed because he was public man. You are right. This is just on piece of the cake. In my opinion there must be a bond between at least on of the top guys with Jane. Currently, I don't know who could be this person. Maybe an unknown relative, an "old" pal of the past or an unreturned love. Red John knows a lot of Janes past. There must be a connection. (direct or indirect).

Why is he a risk? He had a public show at tv where he use his skills to manipulate people. He promise to solve the Red John case easily. Maybe the organisation worked already with Red John. Maybe solving the Red John case would lead to this organisation.

One last fact, that give me good feeling about my theory, is the following. The identity of Red John will be already revealed at the first part of the 6. season. Red John is just one guy (maybe just a tool) of the organisation. I don't think that all the future episodes after the revealing in the 6 season and the whole 7 season episodes will just tell us the story of Red John. I think Jane will hunt this organisation to bring them down.

epilogue
I know that my idea isn't waterproofed. But I don't think that my theory isn't too far of the truth.

Please, feel free to discuss this theory with me. :)

Before I forgot... imho... Ray Haffner fits perfectly Red John.

Why Is Ray Haffner it's hard to say, but here comes my theory:
1)His age is perfect, not too old, not too young. He's member of the visualize, which gave him the possibility to draw the smiley at the Barn while he was a teen.
2)His high fits in. 
3)The lover of Rosalind Harker (blind woman) was called Roy (Roy=Ray?) Maybe it's just a coincidence. 
4)The name RJ gave to the psychiatrist was Jay Ross (JR :D) and again Jay= Ray? could be a coincidence again. The psychiatrist affirmed that he is middle-aged, good health, and he has a good posture.
4) Why did RJ left Teresa alive? We all know that Haffner has feeling for Teresa, that could be the reason.
5) Red John must be a person, who's not successful in his real life (not like Bred Stiles), and that's the reason why he need's to create a false identity. Haffner is not consider to be a great mastermind...
6) In S04E02 when Haffner became Jane's boss, he wanted to get information from Cho, and that could have been a good plan, but he didn't knew that they were such a good team, and they will never betray each other. However this shows us that Haffner always makes tactics, and he's sober-minded. Also when Cho said that Jane is smarter than Haffner, Ray has a(n ironic) smile :)
+1 Do you think the man who is working out in such a dark place alone (S06E02) is not a psycho?

Please share with me, your opinions! 

What is the three tattoo meaning? People spend majority of life behind bars have it but it also means death to the cops in france. The three dots also stand for 3 people within a group, I'm thinking Brett stiles, Ray haffner and Micheal kirkland.

If you have seen the last episode, you should have noticed that, at the end, when the blond lady opens the door to red john, his shadow reflected to the yellow door shows that RED JOHN HAS HAIRS!!!!

So... i would count out Beltram and the sheriff Mc Allister.

I can't say that Haffner is definitely Red John, but if Red John is someone on the list, and Red John did kill the PI then it was Haffner who killed the investigator hired by Red John to bug the CBI.  You can tell from the shadow on the door.  Specifically look at the hair, he is the only suspect left with this hair after Kirkland was killed off.

I read a lot of people here saying that Red John is Jane and that he's not on the list. Guys... read the updates about the show and the interviews.

The creator of the show alredy told that he is definitely in the list and he's not Jane.

With the last episode that I watch I think, for now, that Haffner is one of the main suspects.