Just a few thoughts ...

The most recent murder:  With regard to RJ, this last murder seems very rushed and sloppy (not quite the methodical, fear-inducing type (to Patrick) we are used to seeing and the victim is left alive ... perhaps on purpose?).   In addition, we did not see the trade mark smile face.  Was this RJ?  I'm not certain it was.

The 3-dot Tattoo:  Not having too much knowledge of tattoo's, I did a bit of looking into them.  Although this particular tattoo can have a few meanings, one of them is religious in nature (trinity) ...

Stiles:  When Lorelei says that Jane is "just like" RJ and she is surprised that they did not become life-long friends the moment they shook hands (in the context of Jane is manipulative), the first one that my gut instinct went to is Stiles.  Of course, just like most on this blog, I came up with a list of why he couldn't be RJ ... he is too old, etc.  However, I still think he is absolutely the most "like" Jane and I cannot dismiss him.  This is not to say that he is necessarily the one to actually carry out the murders, but he certainly has the ability to manipulate people and has financial means as well.

McAllister:  In the episode where RJ saves Jane from the teens about to kill him, did you notice the boots?  They definitely remind me of something McAllister would wear and he even mentions in a recent episode about not being able to go up the ladder in steel tipped boots.

Haffner:  He has everything on the list to be RJ in terms of physical characteristics, etc., and he obviously cannot be ruled out, but something tells me Bruno Heller might be playing the audience ...   This is not to say he couldn't have a major connection; however ... like RJ's son perhaps?

Reede Smith:  I would not be happy if RJ turns out to be Smith and do not necessarily think he is ... but one thing I have noticed though is how many times Reede is smiling a lot in the recent episodes ... very strange, I do not remember this in the past episodes so much (I'll have to re-watch them... it kept reminding me of the round smile face that RJ creates.  He also seemed in charge in the meeting with Bertram and McAllister (he tells Bertram "it's your job to know," with regard to keeping tabs on what Jane knows.  In addition, he easily kills Kirkland with quite a bit of vengeance (6 shots to the back).

Am i the onlyone that find weird the way some red john suspects are acting this season?

Brett Partridge, he seemed really frightened in the first episode without reason at least in Patrick presence.

Gale Bertram seems a new person, it appears that he is the opossite of he was until last Season (probably beacause he wants to get to RJ before PJ but stills be really strange)

Thomas McAllister and Reed Smith are suddenly really smart and badasses while in the past they didn't appear to be smart at all or have any impact in the serie.

Bret Styles and Ray Haffner didn't change much they keep not being there much (Bret) or really creepy at times. 

Bob Kirkland in the other side he didn't change at all, he just finished his story pretty straight, nothing weird or strange changes.

Don't you find it interesting that Jane says to Lisbon, 'Now I have leverage'. Leverage? Interesting choice of words. Someone also mentioned two key things, one; Why would it take two episodes to catch Red John if, as seen in the promo, he has them all in a room with a shotgun pointed at them. And two; Would it not be a tacky ending to a highly sophisticated show if the reveal came in such a brutish manner?
I feel as if Jane knows something we don't, and he's using this situation just as he did with his breakdown, so authentic that Red John thinks he has pulled one over on him again.
It would be disappointing if what we have all waited for for six seasons comes down to, 'Is it you? Tell me or I'll shoot you'. And as proved in the Kirkland episode it'snot really his style.

If someone says RJ shits blue, people would wait in the sewer tunnels to see where it comes from. 

http://www.whoisredjohn.com/See-a-theory-Red-John/7461

Explains:

- Tiger, Tiger
- Visualise
- Redjohn's story

Please click red.

So..... They put trackers on the 7 suspects phones. They allude to that at the start of the episode.

They suspect red john is killing the private investigator.......

and they don't say look at the trackers and see who is there........

this is just getting sloppy

Let me try writing that in english.
So, in my opinion it is possible that we have more than one RJ. Rj himself is the original but when he notice that Jane is close he search for helpers. Guys who give him an aliby when he need one and every time when Jane comes too close to one of the fakes RJ kill that one just for the case Jane find him and asked to much or the fake tell someone about the situation. Noticed: first Jane focus on Partridge an voila: dead. The next episode, jane has a hard suspicion in, was about Kirkland and he died to. (Tyger but maybe work for RJ ?)

I can imagine that each of that 7 suspects die exept RJ.

What do you think about that?