On the episode Jane run i to Red John at the end when was take farm a copycat if Red John. The copycat one was gone to killer Jane but the rely Red John showed up and stop the copycat but when the rely Red John was take to Jane he sound like woman with deep voice. So by say that i thing mean know who his Red John is think it the woman name Kristina that say she is psych like Jane she came in the episode 22: Red Letter.
In show wily she was in is she act like she know a lot more then Jane about Red John. At first I was think show work with him but now I think she meant be Red John.