Gale Bertram was the director of the CBI and a member of the Blake Association. He became the prime Red John suspect after Reede Smith was arrested, and the others were all presumed dead. In his final appearance in "Red John", he reveals that he is indeed not Red John.

Who was Red John FBI informant?

In the season 6 episode "Red John", the eponymous serial killer's identity is revealed to be Thomas McAllister, the sheriff of Napa County, portrayed by Xander Berkeley.

Who is Red John's accomplice in the CBI Season 3?

During the season 3 finale, after Red John's accomplice Craig O'Laughlin is killed while trying to kill Hightower in her mountain cabin hideout, Jane (who is in a food court in a Sacramento mall) has Lisbon use the redial on O'Laughlin's phone and tell whomever answers that O'Laughlin is dead.