I accuse Max Winter based on both Red Carpet Treatment and the following theory proposed on the mentalist wikia:

Red John can be Max Winter (Jack Coleman), also called sometimes “Winters”, the widower of the fourth episode of the third season “Red Carpet Treatment”. Bruno Heller dropped us a hint that Red John likes the cold. And Winter is the season of the cold. Winter is the man who gave the shining new gun as a gift to Jane which was used to kill Timothy Carter in the third season finale. In this case, see how the Winter’s bravura into literally manipulating Jane to kill one of Red John’s shills just like he did with the rest of his League to commit evil deeds for him. Notice the way how is sitting on the sofa with his apparent wedding ring. It just mimics the way Jane sits on a couch when drinking a tea and more importantly how Red John was sitting when he went to visit his paramour Rosalind Harker.  He is a Realtor. So he could have easily set up a phony company like “Cutiron Properties” in the first season’s finale. He is someone who is not afraid of getting his hands dirty. As some point during the episode’s run “Red Carpet Treatment”, in the shooting stand scene with the presence of Patrick Jane, Max displays the bravura of a crack marksmanship. RJKshowed an amazing crack-marksman skill in neutralizing his contenders. So does Max in the shooting stand. Crack-marksmanship at its finestAdded by JoeastorAlso, Max Winter bought a gun from an arms dealer from Manuel Montero, the friend and supplier of Todd Johnson, killed by O'Laughlin in order to frame the murder on Hightower. Montero and Johnson were football players along with O'Laughlin. Red John, during his early years of his career in 2000, has initially hid the body of the former Gulf-War soldier and amputee turned policeman Carter Peak, the first male victim and the husband of Janet in a construction site of a shopping center; Is the same  shopping mall  where Janemet Carter ? Max and his son, Jackson, built model airplanes in the workshop-garage. The Las Vegas Zone (with Debonair way, a word used by RJK) is a kind of construction site finished, foreclosed and abandoned, like the house where they find Kristina. Keep in mind that Max is a Realtor. 

I believe that they will go with the obvious suspect Brett Partridge.  I say obvious because most die hard fans of the show (anybody that frequents this website) would know right off the bat that there are many signs that point to him. 

That doesn't mean that the casual viewer that watches every week but doesn't keep up with all the hints will feel it's a cop out.  Most will be shocked and pleasantly surprised that someone who's been in important episodes briefly ended up being Red John. 

I don't think the show will end with his death or capture either.  Jane will either die by his hands or it will be revealed that Brett Stiles created Red John somehow.  This will push Jane's vengeance to a new level and he will be motivated to take Brett Stiles down after he's finished with Red John.  

Who say that Patrick Jane is Red John ; it is non-sense. I don't think so that the scnerio is about someone who killed their own family.I think Red Joh is ; Virgil Minelli. Because he is close to everyone and head of CBI.Therefore Minelli brougt Jane to CBI for consultant.Whereby he plays with Jane.

red john is max winter