Patrick could easily be Red John.  With a combination of a psycopathic psychosis and with all of these "disciples" that Red John has, he doesn't have to actually kill anyone himself, he gets others to do it.  Even when he is supposedly face to face to Red John, he could have ordered one of this disciples to capture Jane and do this.  I don't think that anyone knows he is Red John, everything is done anonymously.  Let's face it, it would be one of those moments like "The Prisoner" back in the '60's or Fight Club from the 90's.  Jane is a mentalist, creating great illusion is what he is best at.  It is always said that the Red John type of killer always likes to insert themselves into the centre of any investigation.