So we now have a list of seven suspects:
Bret Stiles, Gale Bertram, Robert Kirkland , Sheriff Thomas McAllister , Brett Partridge, Ray Haffner, and Reede Smith.
So how did Red John know who was on the list? I am guessing he, or an associate, broke into Jane's apartment and saw it.
I don't know how RJ knew about the girl from Jane's past though.
Loved how the revelation of the handshake (mentioned in previous episodes and confirmed in this one) is the one thing that could reveal RJ.
Bruno Heller talks about whether or not the list is accurate, and the upcoming season. He also discusses whether or not Jane could be Red John. Spoilers beware: