This has nothing to do with Red John, well not directly. 
But I wonder if you guys would like to see more about Patrick and his daughter. I mean, I loved that episode, it was also very important: it showed us what Patrick lost that night.
I know it was a good episode because it's unique, but I'd like to see more of those two together.
Would you? (I've a quick scene in my mind, after Patrcik killed RJ, he sees his daughter and in that moment he knows that he has made it and he can go on with his life).

I'm sorry if I wasted your time, there are a lot of good theories on this website and it's hard to do better.
Take care