Were all here trying figure out who RedJohn is but were going about it in the wrong way. So lets talk about Red John for a second. Red John is extremely intelligent and in many ways Patrick Janes equal. He is also referred to as a classic narcissist who hates people who copycat his crimes and belittles him. 
   That being said I think we can safely rule out Reede Smith and Sheriff McCallister. Next we have Brett Stiles. Brett Styles already has power and control over a lot of people. We know that because he owns Visualize and from what we know about Visualize is that its basically a cult. With that type of power and control Stiles has no need to become a serial killer and we know he doesn't match the Red John profile. However we can assume that Brett Stiles has a good idea who Red John is. Based on that Im ruling him out.
     Bob Kirlkland was recently introduced and is a newer character. I also get the sense that Kirkland is more of an vigilante than a serial killer. He has some kind of tie to Lorelie Martins sister hence the reason he killed Jason Lennon asking him " Do you know who I am?" Kirkland figured out that "Roy" aka RedJohn Killed Miranda who Im willing to bet was Kirklands Fiance and that is why Kirkland is not Red John.  
       Brett Partridge is a weird, creepy but soft spoken type of guy. He has a dislike for Patrick Jane but in a I wish I was like him kind of way. He has quoted classic literature like Red John but doesn't seem to have the intelligence and narcissistic attitude like Red John. Could he be Red John? Sure but for now Im ruling him out.
      Gale Bertram was on the top of my list for a long time because of his status and CBI director. He does seem to come across as a bit of a narcissist but not like Red John. Bertram cares about himself yes but is wiling to protect the interests of CBI first. Why? Well if CBI went down on his watch that would reflect on him an look back on his record and hurt his career. He doesn't like Patrick but is willing to use him to get the job done. While he does have the power and connections to be Red John I don't think he would take the chance at hurting his career by being a serial killer on the side. Im ruling him out.
      Now we are left with Ray Haffner. Ray Haffner is a very intriguing guy. As we know Patrick was told by Lorelei that he and Red John are a lot alike. Jane tend to work alone solving cases and Haffner left CBI to start his own security firm. They both have blondish hair and both have ties to Lisbon. Haffner also was a former FBI agent and a member a visualize. He woud also of been the right age and the opportunity to commit Red John's first 2 murders. Remember the whole narcissistic thing I was talking about? Well in one scene Haffner asks Cho if Jane is smarter than him. Red John also has "disciples" who he had to of recruited and Haffner tries to recruit Lisbon by offering her a new job with more money. Many of Red Johns Disciples seem to see him as "God Like" or a "Messiah" like figure. Things Ray Haffner could have learned in Visualize. So with the Narcissism Ray showed, the ties to CBI, FBI and Visualize he is my prime suspect. He also is a former football player and Red John while helping Jane says "Roll Tide." 
    On another note people Red John is brilliant ok. He isn't going to be stupid enough to give himself away by quoting poems or by acting smarter that Jane when he was around him. Red John only tell Jane what he wants him to know and Ray Haffner is the same way. Remember when Lisbon asked him if he was at the barn during the first 2 murders only to have Ray ignore her and ask Lisbon "We are friends right?"    Ray Haffner is Red John.

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