Bruno said in an interview there is a clue buried in the last sequence of the first episode of the new season 6. I think the clue is this;

In the last scene Patrick asks Ron has he seen Lisbon, Ron says no then he walks away and Patricks phone instantly rings..

I think Ron was in the house, he stole Lisbons phone and went back to police station waiting for Patrick to arrive back from the desert so he could call him and give himself an alibi at the same time.

In the scene where Red John is wiping the blade he has one hand holding the blade the the other hand is wiping it, how can he be talking on the phone at the same time to Patrick? This means the director is making you think Red John is still at the scene when Patrick is on the phone to him when actually he is back at the CBI office.

If you look at the very last sequence there is alot of attention made on Lisbons mobile phone... When she is in the office there is a close-up of her phone showing Patrick calling.. in the creepy house her phone vibrates... and then in the last scene the first thing you see is Ron walking the hallway with his mobile out..

Why would the director put so much emphasis on their mobile phones?