The more I am watching the episodes of this season the more I believe that RJ is not from the list. In each of the seven episodes the writers try to drive you towards a different suspect of the list . Ep 1 towards Partridge, ep 2 towards Haffner, ep 3 towards Mc Allister and so on.
The writers clearly love messing with the audience and the have succeeded!
After pointing to each and everyone from the list, Heller will present the sweetest most likable person of the whole series as RJ.
Please let it not be my personal favorite, mashburn!!!