Guys, fans! The episode 5x22 "Red John's Rules" probably a flashback episode. In this ep. will feature a character named Sean Barlow an irish phychic from Jane's past and maybe we will see Orville Tanner.
That means Jane and Red John shook hands in the past, before Red John killed his family. So Red John never appeared in the show, and we have to drop out all of the theories.
I hope this character Sean Barlow finally revealed as Red John (note: William Blake was welsh, and this character is irish, and RJ has got accent), and I very curious and excited who plays this character.

Sorry guys :( Heller wrap up us in the interwiev when he said "You might already have seen him."