I'm still trying to figure out how RJ compiled the list of 7 suspects. To me this is the biggest curiosity yet to be explained. In my opinion it can't be via Kirkland's theft of Jane's board and material for one simple reason. We see Kirkland is still studying the board AFTER the list has been compliled.

If Kirkland is RJ or an RJ confederate then he wouldn't be studying Jane's board after the list had been made so he appears to be actively hunting RJ for his own purposes.

Truthfully flaws can be found for each of the suspects but from a simple description perspective Smith, McAllister and Stiles just don't fit the criteria. Smith is fat & Stiles & McAllister are old. Partridge is dead so that leaves Haffner and Bertram both of which have been pointed at pretty strongly as being RJ. I'm guessing Haffner but in reality he and Bertram are too tall based on Rosalind's description.

All I know is the first two episodes of the season have grabbed me again. I can't wait to see how this all plays out!