It must be Laroche.  Laroche demands respect.  When disrespected he reacts. (i.e.  when Jane disrespected RJ, and thus his family murdered).  There's some tie to the figurines that Laroche has in his home too. We must find out what was in the plastic container in Laroche's safe!  Even though we may find out who RJ is this season, it doesn't mean RF will be captured... the story goes on :)