ok guys, to add to my previous reasons from the post just below.

1-  Minelli has been twice brought into the show after his resignation in season 2. now both of them were unnecessary you could say, or atleast the one in the santa episode.
2- dont you think heller would make sure the red john person is faded from the memory of people for some seasons so they get that ah moment. many would have even forgotten minelli.

3- in the 100 episode alexa shultz and bob kirkland are brought into the show in the end requesting red john things from minelli. just to divert attention maybe?
and kirkland is shown deliberately to be creepy imo. and then he is made to kill jason lennon under very suspicious circumstances.

4- ellis mars and todd johnson are brought into the picture soon thereafter to divert the attention.