is Oscar Cordero (the SAC detective who talked to rigsby in the last episode about how kirkland got shot  http://images1.wikia.nocookie.net/__cb20131030193304/thementalist/images/e/ed/Oscar_Cordero.png 
non other than red sweater man.. http://thementalist.wikia.com/wiki/The_Red_Sweater_Man?file=Vlcsnap-2012-05-06-11h45m40s44.png 
those who have been follow this show for a long time will for sure know who im talking about.
their facial structure look exactly the same but he looks like hes lost a little bit more of his hair line and put on a few pounds.

if you look up imdb list of casting for the "red john" episode everyone is freaking out about jack plotnick (Partridge) being on the show but so is Kirkland and sophie miller... and so is an actor playing young red john, so im 100% positive they will be showing ......FLASHBACKS. would i be disappointed if it ended up being Brett partridge? NO! that would be awesome but i think its some inconspicuous cop like i always have thought and i think i might have found him....