It's interesting to see that on The Mentalist Wikia and other fansites that they are rooting for Bertram, Partridge or La Roche as Red John. (I honestly loved the character La Roche) Ray Haffner what is obviously the prime suspect on this site is scoring very low on those sites.

I just have a strong feeling that after the next episode people are going to doubt and make theories of another person. And this person will get the majority of the plausible votes.

Kudo's for The Mentalist writing team they are doing a good job to mind fuck the majority, excuse my French lol.