There is no Red John, when Bruno Heller wants to reveal who Red John is they will put small pieces together from ever episode and create a Red John. So what I'm saying is Red John has not even been created yet. Stories change everyday, Bruno Heller probably wakes up in the morning and changes everything around, why? because he can and it's so easy to do.

Red John was probably one of the 7 until ratings for the Mentalist are high, therefor it means they can make more money so they have to change the story line to keep it going. Wake up people it's a TV show and a great one at that.

Not to mention, if Red John was already included in the story line don't you think some internal leak would have shown up on the internet by now?

And again if the leak did show up, they would just change the story once more.
So like others have stated, enjoy the show and GIVE UP!