Okay i know your thinking Wayne Rigsby isn't Red John your wrong but look at this Season 5 picture look at the reflections Rigsby's isn't there and Jane's is too would got me thinking knowing Burno Heller this means something maybe that they are a reflection of each other like Martins says Red John and him are very much alike like the poem tiger tyger tyger 

The fact of the matter is, it does not matter who you pick. I doubt the person they pick, you will be like "oh yes now I see, that makes sense". As I watched the episode where Jane shoots RJ and it turned out not to be RJ the next episode I realized then that the writers can do whatever they want, it is up to them. They could say your mom is RJ. It won't be like they will show you clues that was in previous episodes. If the did then it would be Rigsby. In the episode where Jane shoots RJ. They were going to do away with RJ but for some reason they changed their mind and pulled a rabbit out of their hat and said oh that was not RJ. How would RJ know to send someone else to the mall and have him claim to be RJ and know what his daughter hair smells like. That was supposed to be the real RJ but they backed out for some reason. Like I said the writers could say RJ is the tooth fairy and that is why he draws a smiley face. Don't look into it deep because its not that complex. If you look at old episodes Rigsby was never around when RJ was up to no good. So that is why I thought it was him but it will probably be your mom or mine, not sure.

Rigsby really looks like the sort of person who'd be Red John.

he is red john because he killed the man who killed his dad and also he is a meaney 

It took this from Xenon in Yahoo answers and I agree with it. The text was in spanish so i'll try to translate it to english

In the last chapter of the first season, RJ's ex-girlfriend(Harker Rosalind), describes him as a good person (insists precisely on the fact that he is a very good person, and that allows him to see into people's inside) so Red John, or the character who represents, also appears to the viewer as a good person. The ex-girlfriend also describe him as high and Caucasian. This matches with Rigsby.

Another suspicious detail is that Rigsby and Harker Rosalind didn't appear together in the episode (so she couldn't identify him), and many other aspects, the conclusion is quite simple.

To give some examples, Rigsby shows great concern for the content of their personal file, which was read by Cho, and he demandded him what did it say about him.

 On the other hand, Rigsby shows a strange trauma to women, a sort of inability to communicate with the beloved, or to confess his feelings, to Grace Van Pelt continuously. Apparently, it's a trauma that goes back to childhood, and the causes and consequences are, ineffably, behind the chain of murders starring Red John.

 RJ is always aware of the steps of the group of Lisbon and Jane, something that could only happen if RJ is a real insider. So he could always go ahead of them.

Moreover, in the chapter on the hypnotists, Rigsby says at one point that, killing when you are drunk "could happen to anyone." What's more, in that same episode, when hypnotized, he reveals his true self violent, attacking several people, and being about to throw Patrick Jane from a rooftop when Jane had said minutes ago that "a hypnotized saint is still a saint, "that means that if he was a good person he would have behaved as one, no matter how hypnotized he was.

I hope the translation is good enough

I just saw the Italian-dubbed season 4 finale.
The voice of Red John on the phone resembles the one of Wayne Rigsby.
Now... I have no idea whether the guys of the dubbing studios in Rome talk to the show creators from the US about future developments or not.
Rigsby or not, I always thought Red John must belong to CBI. He just happens to know too many things and way too promptly.

Just because he seems too thick to be a top cop, so must it must be an act. And the series is builing up to a "Woah, never saw that coming": Finale.