It's simple. the one who killed that women that bugged the cbi is not red john.

red john is not messy. he doesn't need somebody to do his works for him. red john knows that he is among jane list so he could easily come to cbi and bug it and even if something goes wrong he is already on the list and he could com with any excuse assuming that he doesn't has an insider within lisbon team already. this is more simple than "hiring" someone.

therefor, whoever sent and killed that women is either a tyger or visualize member as simple as that.

the leverage that jane talked about is real enough. why? because by knowing the killer identity he gets to either tyger or visualize group and then red john because red jone is connected to both groups in his early life (visualize) or current (tyger) even though it might mean that he is a member or was one.


my thought so far:
1. red john killed partridge to send a message to jane. partridge is a tyger member and a disposable one.
2. kirkland has a twin but that twin is not red john and works for tyger group.
3. bertram, mcallister and smith are tyger members.
4. stiles knows red john and has a black dot in his history.
5. the killer that killed that women is not red john. but, he is a threat to red john.
6. haffner in a way is "doing somthing good". knows about tyger and is working to destroy it. tyger knows all about him and kept him silent by someway. he joined visualize to get his back coverd. visualize knows all about him.
7. visualize and tyger are enemies. the one thing they share together is RED JOHN.

Red John is not a person. Cult or organization. Red John's Smiley Face is signature , Tyger Tyger is password of this community. 

if its true rigsby and GVP wont be around for long, i think rigsby will be killed by someone from tyger tyger for looking into kirklands death.

GVP will be devasted and RJ will use the opportunity to use her as a tool against TT without revealing himself to her (Heller giving everyone their wish that GVP is somehow bad). GVP would help RJ since TT killed her husband although shes unwilling to work for RJ. She somehows figure one important clue which will determine RJ though and she proceeds to tell PJ everything, leading RJ to kill her. PJ finally figures who is RJ though with GVP's info, and still get to know about TT. However, TT also figures out who RJ is and kills him before PJ gets to him. This causes PJ to not get his revenge and since TT is a bad organization, PJ decides to bring them down. This serves as a story continuation after RJ dies. 

Damn, i should be the writer for the show instead of Heller.

To tell the truth, it's a little bit strange that now when RJ knows that Jane is getting closer to him he goes and commits a murder in such an unorganised way. I guess RJ is smart enough not to demonstrate something that can easily give him away (like this tattoo).I don't quite understand why Patrick decided  that the detective had been killed by RJ ? RJ definitely knew that the detective was being spied on and it was extremely risky for him to murder her on his own.
Another strange thing is that it seemed she knew Red John (considering the way she greeted him). Then why would she describe his tattoo?
As far as I'm concerned, that wasn't RJ's kind of work. Probably I'm missing something that made PJ sure about the murderer.
BTW, after this episode I'm prone to believe that Haffner is not RJ. What he told Lisbon sounded more like he was one of RJ's puppets.

Your mom is Red John.

thy patridge shall rise again.

however below there is a theory "not fun at all" but interesting about Partridge being RJ and being killed by tiger.org and that will keep PJ wondering why and seeking revenge.

and it will reconcile partidge fans and none fans.

This probably isn't what will happen, but I thought it was a fun theory:

What if Brett Partridge WAS Red John, and the Tyger Tyger group killed him before Patrick could get to him?

This would lead to more seasons of "The Mentalist" because then Patrick could shift his focus from Red John, to taking down the secret organization in law enforcement that denied him of his revenge against RJ.

It's a long shot, but I thought it was a fun theory