If you watch the last scene of ep 6 closely you will notice that Brett stiles does have a tattoo on his left shoulder but it's not 3 dots it's an anarchy tattoo which has similar meaning to the 3 dots tattoo it symbolises anti-government movement it's also used by people who feel they don't belong to any group or cult of certain people however I wonder if it's an actual clue if not then why is it there also I don't believe that red john is the one who killed the pi for two reasons first he is not sloppy to leave her like that he should've sliced her off second his shadow can be seen a moment before he enters and it doesn't look like any of the possible suspects except for maybe Kirkland but I don't buy it one last guess I believe that the wait no that was heard before the gunshot was Bertram's jane asked the three to explain the whole tattoo thing or he will shoot them one by one until one talks so the gunshot was just an attempt to crack one of them so he reveals the tyger tyger conspiracy but can't reveal everything because of the bomb I don't want to seem too meticulous but the explosion started from where haffner and stiles where in the room

So im gonna go with what I consider obvious.
Bertram, Smith and McAllister are part of this big organization that involves police, fbi and who knows who else, so im gonna go with the theory that Red John is not ONE person, but a bunch of people.
Think about it, just like "Hostel" bunch of crazy people who like to kill just for fun so they created this "club" so they can cover each other when they do it.

This is what I am thinking at the moment.

I was the last accuser of Patrick Jane that actually got a positive result  LOL I am proud.

So where are we now.

I am starting to think that a member of the team will definitely end up being part of the tiger tiger group. The tattoo is quite well spread in law enforcement. I think RJ will be part of this tiger group. However Nobody in the group will know or suspect that he is RJ. This person will also be known to Bret Styles.

RJ is definitely not on the 7 suspects list. I am completely sure of that.

The biggest clue I have read as to the identity of RJ is from an Interview from the actress that plays Lisbon. Here is the quote.... which is the biggest clue yet when asked what she thought of the choice of RJ

"I was surprised, and had I been Red John, I would have been equally surprised,"

So..... if RJ turned out to be Lisbon..... 98% of the people reading this would be surprised.

She's not, by the quote, but RJ is very much someone that we don't suspect, hence we are going to be surprised.

So who would surprise you?

It is highly possible its a member of the team. Unlikely but possible all the same. I would say Cho would be my choice. What can be done with him when Rigsby and Van Pelt leave? RJ may not necessarily be killed, he may just escape. Cho killing VP and Rigsby would be quite shocking. Also he is an interesting character that we don't know that much about. Other then he does everything, by the book.

I am still hoping for the PJ = RJ swerve, be great to see where they went with it, if it isn't cancelled by then.

Afterall they could have kept Timothy Carter as RJ and continued the series focusing on other aspects. That would have been a believable conclusion. They had to do a bit of digging to get out of that one. Must be for a good reason :)