This is not a Theory or anything!
Just got some question for you guys ; - )
It goes way back, all thee way back to Season 1 EP 10 when we see a small flash back about Janes break down
http://www.youtube.com/watch?v=2oILijLCjU8
At 0:53, we can see a Red John smiley face inside jane's room when he was at that place, the smiley face is really messy but whatever? who do you think made it? Was it Red John that came to see Jane? or was it Jane that made the smiley himself?
please comment i would like to find this one out :-)
