Going back to the scene, when Gale Bertram, Reed Smith and Thomas McCallister are having their meeting;

Smith asks "Exactly how much does Jane know" to which Bertram replies "that is the queston isn't it" and smith replies "It is your job to find out".

For me, this was an important scene because it looked like Sheriff McCallister had no idea what was going on but Reed smith was curious to know what Jane had figured out. I think Smith is Rj's insider inside the CBI.

Smith was almost directly threatening Bertram so I don't think Bertram is RJ, that not his personality but I get the feeling Bertram is also trying to spy on Jane.

My bet is still on Ray Haffner since he came to visit Lisbon and mentioned how 'lucky' she was to be alive. it would make sense...