Just seen Black-Winged Redbird, we know from Dr Miller's notes that RJ is middle aged, which rules out Bret Stiles and Sheriff Tom McAllister, both are too old.
Reede Smith and Bob Kirkland are too young, which leaves Ray Haffner and Gale Bertram.
If we then factor in the physical description of RJ (medium build, short hair), that leaves Ray Haffner.
We know Haffner is 46, thus middle aged, we know he was 21 when he was at the Elliston farm, we know his visualize links, and we know he likes Lisbon enough not to kill her, RJ spared Lisbon for some reason.
