Hey all you fans out there!

I honestly think that Red John is more than just one person. I find him a little too random at times and also his knowledge and success rate seems to be little too far fetched...even for a genius/ psychic. So I think that Thomas McAllister, Ray Haffner, and Brett Partridge are all Red John.

Furthermore, I suspect that Thomas, Ray and Brett worked for a Visualize complex at one point during their younger years and went through a horrific experience. In the end they escaped their horrific experience, but they also developed a insane lust for blood and that might be were Mr. Stiles becomes more involved with them; by teaching them a code of conduct to operate by and eventually the name Red John and it's signature under which, they all operate separately.

Cheers, and please share your opinions on this theory!