Red John could be a by product of tiger tiger org. He who created the tiger created the lamb (red John). He may have a grouse against the tiger tiger org and may have some members working for him. This way he knows all the inside info.  Alternatively he may be a member of the tiger org.

So, Bob Kirkland was hunting RJ himself – not very surprising, is it? However, why did he kill Jason Lennon then? He could have asked him who RJ is and save himself a lot of time (and murders).

This seems like a major hole in the plot, doesn't it?

This is something about Michael Kirkland.

Robert Kirkland has asked multiple times have you seen my face, do you remember who I am.

Not specifically about himself but asking about his brother. Because they are twins after all

For starters, it seems they are doing an episode of each one of the suspects and then the eight episode is named Red John.

Anyways, the reason I suspect Raymond Haffner (Not going through all the physical descriptions and whatnot) is because he used to work for the CBI and was in the perfect position to keep tabs on everything.

The main reason is because I have clicked onto something.
Lorelei Martins told Jane him and Red John are just like each other. I think this meant something else. Something different & I'm surprised no one has mentioned or figured this out.

It's no doubt Patrick Jane has feelings for Teresa Lisbon. But so does Raymond Haffner...

RED JOHN IS SHERIFF THOMAS MCALLISTER,

Ok. Here I go..

Bob Kirkland and Brett Partridge are goners so that leaves 5 people.

Bertram, Haffner, Smith. In my opinion these 3 aren't RJ, in episode 2 we see Lisbon have a nightmare with these 3 in it and what are they doing? Clearing up a Red John murder, thats their role, they are the ones who cover for Red John, essentially "Getting away with murder" as Kirkland said this episode.

Now we are left with two people: Brett Stiles and Sheriff Thomas McAllister.

Bret Stiles, I think, has a close relation to RJ, we know RJ was a visualize member, and the fact that he knows so much about RJ, he even told Jane where RJ had Kristina. Why didn't RJ kill Stiles for telling Jane where Kristina was? Because Bret was the one who took RJ under his wing and helped him forming a sort of father/son relationship.

Now onto McAllister.

Nick Nordella plays "Young Man" in episode 7(great red dragon) and 8(Red John) (imdb casting: http://www.imdb.com/title/tt3196216/?ref_=nm_flmg_act_2
http://www.imdb.com/title/tt3196212/?ref_=nm_flmg_act_2 )

Here is a clear shot of his face: http://www.imdb.com/media/rm3043796224/nm0634984

Remind you of anyone? A young Sheriff Thomas McAllister, most likely he is going to play young RJ(sheriff) in a visualize farm flashback from 1988.

Another thing, according the script, McAllister is about 45 years old (2008): that
means he was born sometime between 1962-1963; the actor who portrays
him, Xander Berkeley, is older than McAllister (he was born in 1955). This is vital. Why did the directors knock down his age? BECAUSE HE IS RED JOHN. In 1988 he would of been 32-33 if his real age was used but the directors knocked it down so in 1988 he is 25, fitting the Red John was a male under the age of 30 description given by Jane.

Source: http://thementalist.wikia.com/wiki/Sheriff_Thomas_McAllister

There we have it.

All I can say after the last episode is I am so confused!!!!!!!!!!!!

Now I understand what Bruno Heller means by we will be disappointed because I will be disappointed if red john is a group and not one individual.

Also, after learning that Bob Kirkland was out for his own revenge I am really sad he died :(