I don't know who RJ is, but I have theories about other issues:

PATRIDGE IS REALLY DEAD.

Patridge saying Tiger Tiger confirms he was a part of the Tiger Tiger organisation. (He couldn't have been just aware it existed and not a member, RJ doesn't work like that, he would have killed Patridge long ago then.)

Patridge works CSI, so he must have been covering RJ's tracks up till now. So when Heller said Patridge had to die? It's not because he is RJ and wanted himself off the list. (The list had 7 suspects. It's not like Jane had narrowed it down. So why fake his death?) It's because he was going to diverge information about RJ or the Tiger Tiger organisation, or he had made a mistake.

So when he said Tiger Tiger to Lisbon? There are two possibilities:

1. He thought Lisbon was part of the organisation and wanted her to help him live.

2. He was trying to tell Lisbon about the organisation. 

VISUALIZE CONNECT:

I'm pretty confident I got this one right. 

1. RJ is a member of Visualize. (We've known for long)

2. Visualize has dirty secrets as a cult. The Tiger Tiger organisation covers them up and makes sure the government doesn't shut it off. In return, Visualize assists RJ to cover his tracks. 

Brett Partridge is dead.
Bob Kirkland is dead.
Sheriff Thomas Mcallister will be deleted from the list after a short period of time.
Bret Stiles, elderly.
Gale Bertram, bald.
Reede Smith, fat

Ray Haffner = Red John

In addition,

 Red John :http://i.imgflip.com/4a7bq.gif

Ray Haffner : http://i.imgflip.com/4a7e2.gif

Walking. :)

http://tv.yahoo.com/blogs/fall-tv/the-mentalist--closes-in-on-red-john---the-list-is-down-to-five-na...

Rebecca Cutter : What does that mean for our countdown? Well, according to Cutter, we were a little early crossing Tom McAllister off the list, but she definitely confirmed that Partridge and ... well, you'll have to watch to find out who is off the list. The entire writers' room (not just show creator Bruno Heller) had input into how Red John is finally discovered, and Cutter promised, "It'll be a good reveal. There's a lot of twists and turns to get there."

Heller did a great job at making people believe Kirkland (and Partridge) was Red John (or a friend of his), I'll give him that.


My take (short version);

I'm talking about the man doing the killing. If it is the same person killing all those people then in my mind it's Ray Haffner. I just can't see the others on the list doing the killing, being the person who thrashed
Rosalind (blind woman) and at the same time being the person with good posture/excellent whistler who met Jane's shrink.

McAllister, Bertrum & Smith are merely parts (pawns) of the super secret best friends club. Inside info, keep an eye on Jane, etc

Styles is a codger who probably knows Red John (possibly funds RJ's shennanigans if needed) and the other suspects (some, maybe not all).

The soft voice of Red John is what always throws me. It must be technologically altered somehow because none of these guys sound like RJ whenever his voice is heard.

If it is one of those 7 (now down to 5) then it's Ray Haffner. I'm still expecting to find out that RJ is none of these guys at all. Feel free to disagree. A lot of fantastic arguments on this site.

So here's a thought...what if Red John is Michael Kirkland, Bob Kirkland's twin brother?

Bob hesitated when Patrick asked him if Red John killed his brother and answered in a way that seemed very much 'he killed the brother I knew, he's as good as dead, etc.". His body was never found and he was never heard from.

The Kirkland brothers had a rough and abusive childhood, which clearly manifested in some psychosis on the part of Bob and caused his brother to spiral downward.

Patrick could have shaken his hand at any point thinking he was speaking to Bob - it would be easy for Michael to accomplish this as a twin and with the manipulating skills we know Red John to possess.

Also, this would add some wow factor the the big reveal, as he is not on the list of suspects that we have left, but only because Patrick may not be aware that he encountered the twin, rather than Bob.

Thoughts? 

It is Ray!!Why?Just read it:

We have clear evidence to know who is Red John.So why are we do not follow them?Throughout the series we got a description of RJ and if  we compared it with Ray....That's what we have:
1.Rich, influential member of the sect vizualist and therefore may be a manipulator
He has many friends and people who can help at any moment.Rather, vizualist is cast,which help RJ
2.Average growth, not loose body, a pleasant voice, short straight hair,his age
3.He likes to whistle
4.Cautious, reserved, secretive
5.Close to Teresa and this is important for him

+It can be only him.Simply by using the method of deleting,we can say that
Stiles:not suitable for age of RJ...He knows who is RJ ,but can not tell,cause it is person of his business
Bertram:not suitable for  the description of all
Sheriff:could be,in third episode we were confused...But his is not suitable for  the description of age,appearance, body and he  seems not so smart
Smith:assistant of RJ people(group)

It is all)