There are two options for me. Brett Partridge and Ray Haffner.

Also, I still do not understand why the other suspects are interested in producing it, and theories. :)

Bob can not Kirkland. Because, you know Red John, the actual list. If Kirkland is Red John, Jane, why would he want a real list? Bruno Heller, said that the last five minutes to pass blood. I think Red John, Kirkland kill. Red John for an early released publicly, even if Kirkland already take out easily from the list. No other suspects are already Red John atmosphere.
As I said, my favorite two suspects, Brett Partridge and Ray Haffner.But I'm Brett Partridge, Red John, I think. Reason: Brett Partridge body was revealed. Maybe it might seem like a simple event. But really dead, dead, dead body on the show and did gerekilmiyor given precise information? Brett sildirdi the list itself. But Jane did not check it. Brett thinks himself clever. But I do not know that Jane did not check her knowing. Red John himself fall into his own pit dug. :)