So far, it looks like Brett Partridge is Red John. I don't write the details because there are a lot of here.

If I well remember, Bruno Heller said directly end of the season 3, we might have already seen RJ. This means, Red John probably someone who appeared until season 3.

Honestly, I'm sick of the Red John story, beacuse we have been waiting for 5 years his character be revealed. It's too long, annoying and boring.

I hope, someone of the 7 suspects is the real Red John, and will not just be a trick.