Here is my theory. After watching the finale, Heller gave us some dead clues.
-- Red John is someone in Jane's past. Someone he grew up with during the circus days. This was revealed through some past video during the season finale.
-- Red John killed a person in Jane's past. Not from the recent past, but a childhood friend. Jane mentions to Lisbon that Jane has not seen her in over 30 years. The last time Jane saw her was when he was 12 years old.
-- Red John knows Jane's secret in which Jane has never told a soul about until the finale episode.
So with those clues, I think we have an entire new list of suspects that are not in the 7 that CBS mentioned. If we are looking at Jane's childhood than we are looking at only a few faces.
Bret Stiles is old enough. But he doesn't have the look of a killer.
JJ LaRouche is a perfect age, but is too large. In the episode where Red John shows his shadow we see him as a average built man.
Bertram doesn't fit it because he's too naive and honestly doesn't have the motive to being a serial killer. Bertram is working with Red John that's not a question, but him being Red John isn't.
That leaves very few people left, I personally think it's someone that Jane knew when he was a young kid. The only person I honestly can think of it now is SEAN BARLOW who was in the finale tonight. He had that swagger about him, as well as had the build and the height. He was also incredibly clever and even got Lisbon's head.
