Pienso q es el xq a salido varias veces ya en la serie y tiene las características físicas de red john, siempre aparece para comunicar algo o para escoltar a un preso, x eso debe conocer a patrick y tambien pudo ser el que mato a la que traajaba en el cbi y mato al equipo del bosco, que cuando la mata se ve de espalda y es bastante parecido.

Heller said that RJ is like Waldo, he is always in the backround.......Ron is ALWAYS in the backound.

Ron 
John 
Red Ron
Red John

As the season go on i think we will keep seeing the man we call Red John, if Ron starts to talk more than he has to be RJ. I mean he's got to be walking around in the backround all the time for some reason. i also think that Robert Kirkland works for RJ because of the ending of the last episode!!!

I think Kirkland is either working FOR Red John (understudy?) or has his on agenda against Lennon, something we don't know about Miranda's/Lorelei's death.

As we know Red John has connections and needs money. This is why I think Kirkland didn't like Lisbon following up on Volker, because he is a source of money for RJ and his antics. I think this money could have funded an appearance change, but I personally think that surgery is unlikely, and the Kirkland and Lennon had history, which will come to light over the next 6 episodes.

I don't think that RJ will be revealed in season 5, but I believes that on discovery on who it is, it will link Kirkland, Visualize, and a mole in the CBI/FBI, and the farm from the past. I don't think its a relation to PJ because the murders at first were not related to PJ until the murder of his wife and daughter; only then it got personal.

A part of me thinks Virgil Minelli could be involved, but unlikely. My bet is on Ron because for those viewers who aren't googling the theories, it would be beautiful.

Ron and Kirkland are the same person . He is either RJ. Or RJs number 2

he is in almost EVERY episode even if it's just walking by this has to be for a reason...

The number one clue we have that is concrete is that RJ is a man who Jane should be friends with but isn't. Since Ron is on the team but isn't close to Jane is very... Coincidental. Most other people on the suspect list are either his friend or enemy. Ron should be his friend. But isn't.

The guy looks in his 40s..

His hand looks as the same as the episode of kidnap in a barn when we see RJ drinkin tea..

Absent from scene during mass murder of Bosco's team

Immediate leak of info when something was known only PJ and Lisbon as discussed in office and someone who can easily take Wainwright from office

It would be a big turn off if it turns out him though.. A smart killer like RJ spending half of his day in CBI office just to monitor what these folks are doing.. RJ seems like a man who likes to kill around and enjoy life as well... Ron has to do office chores everyday.. RJ's character demands him living a better life..lol