Bob Kirkland is dead, but it makes me wonder if Michael Kirkland is still alive? I believe he is. For one, Bob asks Jason Lennon if he recognizes him, and he says no, then Kirkland kills him. It makes no sense why Bob would have killed Lennon if he was trying to figure out who Red John was and what became of his brother. I believe Bob was convinced that Red John is his brother, and that is why he embarks on this personal crusade to take Red John out all by himself.

Also when Patrick tells Bob that he is on Patrick's list, he replies that it makes sense. This is further evidence that Bob thought his brother was Red John, because if Bob made the list, then his brother certainly would have as well.

Another thing was that Bob says that his brother was getting help from a man that changed his life, but took him away from his family. That sounds a lot like he ran into the charming fellow we know as Brett Stiles, and our favorite cult, Visualize. Michael was a drug addict, on the Visualize farm, the man running the farm where feeding the former addicts drugs. What if Michael lost it one day and went on a killing rampage? 

Finally, if Michael is an identical twin then it makes sense how he could be in all of the same places Bob was allowed to go. People would look at him and make the assumption that he was Bob with the Homeland Security clearance. Perhaps, Red John learning from Brett Stiles, is able to convince people to never publicly out him? I'm not sure.

But it makes sense, Michael grows up with a sadistic father, and falls into the same issues. As a young adult he is captivated by the charm of Brett Stiles that promises to help him overcome his issues, but also validates the evil desires within him. Remember, many people from Visualize end up killing after being manipulating by Brett Stiles. Michael tries to change, but the farm project goes terrible wrong and provides him an outlet to begin killing. Or Brett Stiles sees what a catastrophe the farms are, and convinces Michael to end it by killing the people leading the farm. But what Brett does not realize, is that he unleashed a monster. Brett's hands are tied, he unleashed Red John, but he cannot turn him in because he is the culprit behind those other murders. 

Finally, there is a lot to be said about the connection twins have. Bob, being Michael's twin recognizes from the Red John case files clues that lead him to the conclusion that Red John is his brother. What do you think?