Just a little prophecy about the next season finale:

Jane will reduce his list to a very small group of people like 3 or 4.
Then, in the season finale, he is going to play a trick on these people in order to reveal the identity of the true Red John among them. (Somehow as he did in episode 3x23...) This would be a typical season finale for Bruno Heller.

However, he is going to fail because Red John is not on his list and hasn`t been there. All of the people on the list are not guilty. (Otherwise the rest of the work would be pretty easy. Too easy. Red John wouldn't have played with such a high risk)

Red John is either a woman (I do not think so) or he is somebody he shook hands with before he killed Janes family, so Jane didn't even put him on his list in the first place.