*READ WHOLE THEORY BEFORE YOU SAY IT'S WRONG*
Patrick Jane actually is the murderer of his family, and he is trying to devise a plan to accuse someone else (the 7 suspects). This would be a very similar plot to the film "Shutter Island". This theory demonstrates the "symmetry" mentioned from the Tyger Tyger poem, suggesting Patrick's split personalities: Patrick Jane the traumatized victim ~or~ Red John the murderer. Also from episode 1 Season 6, when Lisbon noticed Partridge's GPS tracker at the scene of the crime and she came to find him killed by Red John, thus if Red John is truly one of the 7 suspects, another GPS tracker (other than Partridge) would've been there. Also, since Red John killed off Partridge, I predict that he will continue to kill the rest of the suspects except for one, and Jane will later encounter that one suspect. Jane will then kill the last suspect making the audience think he just killed RJ and then ... Jane will draw the smiley face with the blood, revealing that Patrick was actually Red John all along! Patrick will then use the excuse that he killed Red John and no one will know.
Now I realize there is tons of evidence against this theory but I believe that would be the ultimate twist.
