Red John is most likely a man
He appears to be a Caucasian, and is a white person as described by Haley
Red John has an average height: Rosalind described him as "just under 6 feet tall"
Red John has short straight hair (as described by Rosalind Harker)
Red John either has or puts on an odd, high pitched and soft voice
Red John should be older than 30 years (since his murders date back to the 90's)

Brett Partridge is a Caucasian man that has an average height. He has a soft voice and his age is around the same as Patrick Jane. The reason why I choose him is because among all the other suspects, he fit the most number of clues.

Red John kills Jane's daughter and wife when Jane taunted him on tv. Patrick Jane call him sad tormented person. The reason why RJ killed Jane's family is because he feel offended. He feels offended because what Jane says is true. Brett Partridge is a very sad man. He may look happy and cheerful but that may just be an act. He is a very sad person inside as people looks down on him and people always think he is silly. Jane says that he is irksome and the whole CBI is laughing at him. If Mashburn is Red John, he would not kill Jane's family when Jane taunted him. Mashburn will not get offended because he knows he is not a very sad person. Why would Mashburn be a very tormented person when he has all the money?

when there is Red John cases, most of the time Brett Partridge is there. In one episode, Brett Partridge describe how Red John kills his victim with their blood drawn on the wall with three fingers. How would he know that if he is not Red John? Brett Partridge also has the same smile as Red John Symbol on the wall.

Brett Partridge doesnt seem to be impress with Jane psychic abilities. The reason he is not impress is because he knows that Jane is not psychic. Red John also knows that Jane is not a psychic as he call Jane a dishonest little worm after killing Jane's family. This explains why Brett Partridge doesnt get impress easily. It is because he is Red John.

When you look at Red John's episodes in Season 1 and 2, the body shape of Brett Partridge fits Red John body shape. Red John is not so muscular and not so tall, he is just under 6 feet tall as described by Rosalind Harker.Walter Mashburn is 6'3 feet tall. Mashburn is taller than what Rosalind Harker describe Red John to be. Brett Partridge is 5'11, the height fits Red John characteristic.

Bret Stiles says that Red John is jealous of Patrick Jane as Red John tries to take everything Jane has. Brett Partridge might be jealous of Jane because Jane is a very happy man and has a good life. Brett Partridge looks like the kind of guy who is a loner and weak. This explain why he would join Visualize. Visualize is all about being the best you. Mashburn did not have to join visualize to get all the right connections, he is already rich and powerful.

Bruno Heller says that when we find out who Red John is, we will be disappointed. We will definitely be disappointed if it was Brett Partridge. Brett Partridge has been suspected since Season 1 are aired. Bruno Heller might be throwing us off when he put Robert Kirkland, Ray Haffner, on the screen. He is trying to make everyone forget about the forensic guy who appears on Season 1.

Red John could not be Rigsby, Cho, Van Pelt, or Lisbon. In Season 4 finale,they are trying to trap Red John on the limo, it doesnt make sense if one of them is Red John. Red John could not be Patrick Jane's dead wife, why should she kill her own daughter? That is the most stupid theory I have ever read. If she did not want her daughter, she might as well do abortion in the first place.

I hope that Red John is Brett Partridge. There is no other pleasing storyline than a forensic guy who looks silly and foolish is actually a serial killer.Im sorry for my bad english.

When thy little heart doth wake
Then the dreadful night shall break

by William Blake

Remember Bertram saying this poem at the end of an episode, to Lisbon and LaRoche? 

Here is what I think. Bertram didn't say this because he is a friend of Red John. He told this because he simply heard it from Red John, without actually knowing that the person is Red John.

In the last aired episode, they focused on Bertram and his poker thing. Bertram is stubborn, he has to win at poker. He can't even bluff, so there is no way he is Red John. Red John is a manipulator of mind.

He is also not Red John's accomplice. He would never be so foolish to reveal himself this easily by telling the poem.

He simply heard it and wanted to use it. Like an interesting word you recently learned and try to use it to impress people. That's what Bertram is, he learned the poem, found it cool and used it.

But, who told Bertram the poem? Was it a guy from his poker nights? Or a close friend? 

I believe that this poem is not an office thing. You talk about stuff like that when you are enjoying your time, having a drink maybe. So my bet is Red John is a poker mate of Bertram. But this is because we dont know something else about Bertram's personal life. Could be something else too.

What do you think?

I've written a theory for Mashburn previously so in this theory I'll just focus on some small details that would support Mashburn being RJ.

First, RJ is very careful not to leave any real clues as to his identity.  He would not arrange to meet Jane because it would be too risky.  This is why I believe that RJ meeting Jane was a coincidence.  Mashburn just happened to be one of the team's suspects for the murder in Redline.  Redline is full of clues/evidence for RJ being Mashburn but I'd like to focus on how this coincidental meeting changed RJ's relationship with Jane.  A few episodes before, RJ has Rebecca kill Bosco and his team to cover up the evidence uncover when Carter Peak's body was found.  RJ was forced to do that to keep himself safe instead of it being a directed mind game toward Jane like we see in later RJ episodes.  Rebecca killing the team and telling Jane that RJ missed him just means that RJ wanted to use Rebecca to the fullest extent seeing as she would have to be killed after Jane caught on.  At the end of that episode, I believe that RJ's first concern was his safety and playing with Jane was fun but not his top concern.  Then comes the episode Redline where RJ/Mashburn meets Jane by coincidence and RJ experiences real risk as he talks with Jane and manages to slide past Jane's radar.  This is what triggers the change in RJ and Jane's relationship.  RJ finds that he enjoys the risk of really playing with Jane.  That is why in the second season final, RJ takes the very risky action of following Jane, intervening to save Jane's life, allowing Jane to see him (albeit with a mask - but body shape & height), actually speaking to him and taunting him in person.  Remember in Pilot, RJ was content to let Jane catch his copycats but in S2 final RJ wanted to play with Jane.  The difference is that Mashburn/RJ had met Jane and acquired a taste for playing risky games.

Second, when Mashburn returns in Red Hot, he at first pretends not to remember Lisbon's name and Jane has to remind him with "Agent Lisbon."  Later when he's stepping into the room with the bomb, he steps out again and suggests that he and Lisbon should get together, calling her Teresa.  Mashburn/RJ would have tried to throw Jane off guard by looking like he'd forgotten Lisbon when RJ obviously would know a lot about Jane's team.  I think that Mashburn/RJ somehow guessed that there was a bomb and had to quickly invent an excuse for stepping back outside.  Mashburn is very familiar with bombs (starting making small ones in Reform School) as is RJ who presumably made the jacket bombs that were used in the first part of Strawberries and Cream (S3 final).  Mashburn could have guessed Yuri would try something like that (which is why he took the opportunity to get Jane/Lisbon on the case), smelled or noticed something in the office that meant bomb, or read Yuri's anxiety about the bomb.  What I'm saying is that RJ/Mashburn pretended not to know Lisbon but stopped that pretension as a way to get out of the room. 

Third, Mashburn took the time to flirt with Lisbon and he even slept with her.  RJ would have known how risky it was that he had actually met Jane so I believe that to throw any suspician off of himself, RJ/Mashburn developed a relationship with Lisbon in Red Hot and then ordered O'Laughlin to kill Hightower, Lisbon, and others in S3 final and tried to get Jane to kill Lisbon in S4 final.  RJ is very clever.  He is clever enough to throw suspicion off of himself by liking Lisbon as Mashburn and nearly getting her killed as RJ.  That would throw off Jane's suspicion.  Also note that Mashburn is the only suspect with the same power of seduction that RJ has shown in seducing women over to his side and inspiring trust.

Fourth, in Red Hot, Mashburn stops Else from stabbing Lisbon with a knife.  After Lisbon arrests Else and leaves, Mashburn holds the knife naturally in his left hand.  I think most people would put a knife down immediently but Mashburn naturally lets it rest in his left hand - most people think RJ is left handed.  I think Mashburn is the only suspect that we've seen holding a knife. 

These are just observations that support my theory which can be looked up on the website.  Thoughts?

I think that that the show will continue progressing in a slooooow way like it has been happening last seasons.

1 out of 8 episodes continue with the RJ story and the others are just random non interesting cases.

I have been thinking and untill the end of the show it last season 4 finale and the hole 5 season, so I amagine that season 4 finale would make thinks a little bit more confusing instead of easier in order to have enough elements for the 5 season.

I predict that the end of the story will be simple. I can't imagine a "super tricky i cant believe it" ending like RJ being PJ or similiar. I think that it is going to be 1 person that we know and that we wouldn't believe it's him.

So how would the story progress in this chapters? I think that a lot of old characters will appear again in orther to make the decition more difficult, so Mashburn will come back, Lorelei, Kristina, Rosalind... And a lot of non story episodes too till the season 5 finale that I imagine will be hurried and dissapointing for us with many things without explanation.

That's my opinion floks :)

My choice? Mashburn, for me he is the character with more posibilities. Second choice Minelli and Third Rosalind. I think that Van Pelt won't be involve but they will make us think that she is.