The first thing; there is no Red John.
Red John is not a person, Red john is a sect. So that jane is wasting his own time.
But Jane has to find The Creator(Leader).
Suspect list is getting decreasing... Obviously I am pretty sure that Creator is Bred Stiles.
Stiles is leader but He has never killed someone we know.
Remember from S6E4 Bob Kirkland said "my brother has quited to using alcohol suddenly"
Leaving to using alcohol is very hard to do everyone knows :) But Bred stiles can hypnotize him easly.
(Forgive me İf I made a english grammer mistake)