Bertram taunts Jane and Lisbon about getting close to Red John
and says coyly, "I am many things to many people." That exchange
certainly casts a lot of suspicion on Bertram.
Heller: Yes,
it does. He's a very suspicious character, and those suspicions are not
without foundation. [But] they're not necessarily the foundation that we
think they are. One of the things that is going to be revealed in these
next few episodes is that there is a whole lot more going wrong in
California law enforcement than simply Red John. And Bertram is both a
prime suspect as Red John, but also deeply involved in that other plot.
http://www.tvguide.com/News/Mentalist-Bruno-Heller-Season-6-Premiere-1071429.aspx