This is a reply to Theory #1041 • By lambandtiger1


 First Read his Note:

Quote
"It's about a couple things I found
interesting in 'The Crimson Hat' (season 4 finale).

One word that Red John says when he meets Patrick has always kept me curious. 

- Hello, Patrick.
- How you doing?
- Debonair at all costs, huh?
- When did you know?
- Oh, you strung me along for a good long while. Well done.

Debonair – adjective
1. courteous, gracious, and having a sophisticated charm: a debonair gentleman.
2. jaunty; carefree; sprightly.

If
you go back and watch the final scene on YouTube
(http://www.youtube.com/watch?feature=player_detailpage&v=pDqVYNtTso4#t=130s -
use that link to go to the exact moment I'm talking about) and you'll
see the street where the limo is being chased is called Rainer Av, which
is intersected by Debonair Way. Coincidence? Heller told us to watch every scene of The Crimson Hat carefully."

End of Quote

NOW My logical explanation is that when Red John said the word Debonair its because he was looking at the street sign while on the phone with Patrick ,
if you look at the chase scene at 2:10
http://www.youtube.com/watch?feature=player_detailpage&v=pDqVYNtTso4#t=130

when Agent Susan Darcy intercepted the Limo she was in a place where she could see the Debonair sign in front of her , so my guess she could be Red John or may be RJ is the FBI Agent who was with her in the Car.