Ray Haffner Now possibly a Red John suspect after "The Red Barn" episode.  He fits all the criteria so far set by the show: High ranking member of the CBI, a Visualize member (which would describe why Bret Stiles knows so much about Red John), he has shook hands with Jane, and after the evidence from "The Red Barn" it seems possible he was at the farm in 1988 when one of the first Red John smiley faces was drawn.  He fits the age, description, and mental intelligence of what we, the viewers, feel Red John is and has.

I just read an interview online with Bruno Heller about season 5 and here is his exact quote, "The trick is going to be — and this is coming — bringing the audience along and making them second guess themselves and ask, “Is that him? Is that him?” So this is why he has brought Haffner and kirkland onto the show to make us second guess ourselves. With that said, I do not think RJ is kirkland or Haffner. I'm still very curious to know how PJ knew how to go to Brett for help to get Lorelei out of prison. There still is a lot of questions that need to be answered before we can really point the finger at anyone. I have a pretty good theory, but don't feel like posting it tonight. 

Here is the link to the interview http://insidetv.ew.com/2012/05/18/mentalist-finale/

I think it is Ray Haffner. He was 21 when the Red John murders at the barn happened. And he didn't answer when Lisbon asked him if he worked there. 2nd of all, he is a man and is a good fit. And his voice could sound like Red Johns if he tried.

Bruno Heller is messing with us i bet he stalks this site and looks the the theories and laughs because he makes a episode puts someone from from Jane's past makes them look guilty or related to Red John somehow and bang everyone thinks there Red John , It is not gonna be that easy.

On another note from watching the last episode i learn that Red John may be a member Visualize witch got me thinking if Red John is a member he would have to be in the inner circle of the members like the people at Brett Stiles table because Red John has power money connections now there's no way just a member of Visualize could have all that power and not be at the top ( The high ups in Visualize ) So my theory is that Red John is one of those people or Brett Stiles , but i had a thought that what if Red John is the leader of Visualize and Brett Stiles is a close friend because Brett Stiles has people do what ever he wants and so does Red John just like Visualize members do for Brett 

It was me... I am Red John

I don't think it's the FBI guy who went with Lisbon to invertiew Lorelei Martins' mother. Lorelei couldn't have known that they schook hands. Of course it's possible it's a mistake from the writers but..let's assume it's not. 

Bret Stiles is someone that everyone thinks off. He appears often and is smart. It's possible his visualize is the organ that kills, seeing that all of Bret Stiles' people blindly follow him. Also Stiles was in the episode when Jane found out that he knows Red John. But because alot of people think he's Red John, I don't. It would be too easy. 

Brett Patridge might be the one. First off there's his voice. Though many of you would find the voice match to easy to guess, I for instance didn't even know about it untill I saw some videos (just now) and read some stuff about it on the forum. I don't think the writers would ever guess so many people would be trying to find out who Red John is. But then again, since most of the people here think he's RJ, he just might not be the one. But the Enigma is the main reason why it's probably him. The poem 'The Tiger' is key in finding out who RJ is, Jane knows that. It's written by William Blake, who drew a partridge in the title. Partridge <-> Patridge. When it comes to shows, especially the ones as good is The Mentalist, I don't really believe in coincidence...

But then again. The way Lorelei said 'you should have become friends when you shoke his hands' (or something like that) makes it seem like they don't really like each other and that they have only met once/in one episode...

No real suspect, just some thoughts :)

Just a little prophecy about the next season finale:

Jane will reduce his list to a very small group of people like 3 or 4.
Then, in the season finale, he is going to play a trick on these people in order to reveal the identity of the true Red John among them. (Somehow as he did in episode 3x23...) This would be a typical season finale for Bruno Heller.

However, he is going to fail because Red John is not on his list and hasn`t been there. All of the people on the list are not guilty. (Otherwise the rest of the work would be pretty easy. Too easy. Red John wouldn't have played with such a high risk)

Red John is either a woman (I do not think so) or he is somebody he shook hands with before he killed Janes family, so Jane didn't even put him on his list in the first place.