For a long time now I've been wondering if a single person could be Red John.My theory now is that it is not a person, it's an Idea.
The trailer for Episode 7 and two previous episodes confirm that.I do not believe it is either anyone from Jane's team or his suspects.There are in fact two chances:a) it's a Movement (like Visualize, which was inspired by RJ) consisting of manyb) it's someone else ,that will surprise us all at the end.Either way - good to have a show to write and think about:)