I almost want to put Lisbon's Picture to the left. Lisbon is not RJ we all know this.  But, we have to rememeber that Lisbon and Walter have a relationship.  She spent a night with good old Mr. Walter.  She may have been told things,  seen things,  offered things?

Have we seen Lisbon's left shoulder lately?  If someone can get me a screen cap let me know.  Post the encounter.  

I digress.  Lisbon has been interested in Jane's room Jane's list and to the point where it doesn't seem genuinely helpful.

Also,  she seemed very concerned that Jane was going to get hurt by RJ like it was a trap.  Like she knew that none of the 5 in F&B were RJ.  She might have been lured into RJ but still might have a pang of guilt and care for Jane.  

However,  if Lisbon didn't know isn't it really funny that RJ not only killed Jane's family but also slept with Lisbon first. Sorry for the darkness of that just comical.