This episode gave a clear indication to me that the 'Tyger, Tyger' thing has implications beyond Red John, particularly for law enforcement in the state. Here is my theory on how it's all connected: 

Random quote - Stiles: "I know so much more than you or Red John can possibly imagine" 

Stiles is the head of the 'Tyger Tyger' group, making the most of Visualize's law enforcement contingent. Stiles and Visualize are obviously involved in shady business, even something as big as murder, and it's been implied several times. The followers are like drones, and many of them are law enforcement or connected to it. 

Red John is a member of Visualize. Ray Haffner. He has been utilising this 'Tyger, Tyger' group for his own needs. Recruiting followers, people in law enforcement etc. MAYBE even using the Visualize brainwashing techniques he no doubt will have seen or experienced as a member. 

Bret Stiles doesn't like Red John and his taking advantage of his empire. This along with his slight affection for Jane explains his leaking of some information down the years, however he clearly knows more. He holds most of it back to protect himself and the organisation. At the end of the day, the arrangement Stiles and RJ have is a mutually beneficial one. But maybe Stiles would like Jane to catch RJ to get him out of the way - but he has to go about it carefully, or risk exposing his own doings. 

Brett Partridge was a member, probably working on cleaning up or fixing crime scenes etc. Bertram is a member, one in a massive position of power. It also explains his randomly quoting Blake back in 'Red Queen'. Smith is a member (obviously) and so is Sheriff Tom McAllister. This explains the meeting of the three of them in Bertram's office, and also shows how it has corrupted law enforcement on different levels, from the head of the CBI down to a county Sheriff. Any of these 3 could be working for Red John through the group, or they could solely be a part of the 'Tyger, Tyger' group. That's a question that's still open. 

Why was Todd Johnson killing police? That's a question that has been asked many times. Could it be that he was simply getting rid of those in law enforcement who were catching on to the whole sordid arrangement? 

Finally, this was all hinted at back in season one. As we all know, Jared Renfrew wrote, in blood, 'He Is Man' or 'He Is Mar'. 

As it turns out, it almost certainly meant 'He Is Many', but in a way none of us expected. 

One thing I CAN'T figure out is the use of the poem. Did it exist as this 'password' BEFORE RJ quoted the poem to Jane? Said poem clearly has symbolic significance in regards to Jane and RJ, something that RJ surely knew whilst reciting it. But beyond that? 

I might have more to add to this as I process the episode and past ones. Cheers. 

Let me know what you think. 

What if Rosalind Harker lied about RJ's appearance. When Rigsby and Cho open the locker (Season 1 finale) and read the letter by Rosalind, there she will mention that she has found the card behind the sofa. Ok.. She found the card, then how can she write a letter to that address ? She is blind and could not see. how can she write a letter to that address. That card is not printed in Braille's Script (im sure). Just wondering. 
  

I have been studying up on this for a while now. I think I've seen every episode of the show. And I'm pretty convinced, now more than ever, that Ray Haffner is Red John.

Here are my reasons:

First of all, Ray Haffner has been part of the show the longest (outside of Gale Bertram and Tom McAllister).

Second of all, he fits the description PERFECTLY. Better than anyone else. Rosalind Harker said that Red John was of average height, falling under 6 feet. He has an average build (not too soft, not too hard), and has short, straight hair. Sophie Miller said that he is middle aged. Patridge and Kirkland are both dead, so Red John can't be either of them. Bertram has very little hair, as does the Sheriff. Reede Smith is a little too "soft," and Bret Stiles is much too old. That leaves only RAY.

Third of all, every single one of the men call Lisbon by her last name. All but one. Ray Haffner calls her Teresa. And the way he says it is similar to how Red John says it. It sounds like "Treesuh". Remember, in the first episode of the season, "I'm sorry, Patrick, Treesuh can't come to the phone right now, can I take a message?" The very next episode, during Lisbon's dream, Ray calls her Treesuh as well. Also, kind of strange how Ray is the one to slit her throat in her dream, right?

Fourth of all (I'm sorry about the "of alls"), every time Red John has ever used an alias, he's always had 3 letters in his first name.
EXAMPLES:
Dr. Joe N.H.
Red John
Roy Tagliaferro (forgive the spelling on this one)
Jay Roth
RAY Haffner

Red John didn't kill Lisbon in the first episode? Why? The only reason I could think of is that he likes her. He even tried to pull her away from Jane last season by inviting her to join his private firm. He wants to hurt Jane, but killing Lisbon (which would devastate Jane) would hurt him as well. So he tries to do it by taking her away from him.

Ray is a part of Visualize. He talks, walks, and even resembles Red John. If it walks like a duck, and it quacks like a duck... it's probably a serial killer.

If it's not Ray, I'm going to be shocked outta my mind!

Love the show!

He's the only suspect left that fits Rosalind's description of Red John..