Guys i have found out about the conspiracy behind the mentalist show.
Red john is a real person because visualize is a real organisation
masked by the name CBS. You can see for yourself , visualize and CBS
both have same symbol. That means Red John is someone real so my guess
is that Red John is no one other than Nicholas Cage himself. he fits
rosalinds profile and his last name is cage which sounds like prison ,
and Red John will be in prison when he is discovered.