Kappa
Captain Dubois (Marc) was found among the other passengers, and it would have been unlikely for him to have been in the Rest Module. Captains rest is just aft the cockpit, a cot and a curtain, as I understand it. No ID was forthcoming as to his injuries, I believe the "Seated" pax were described as having injuries consistent (patent) with those in seats at impact. He most likely would have been unbelted or loosely restrained? As it happens I believe his rest was up at 0200, the time of beginning of upset? He likely took off, captured cruise, and left the cockpit, first rest. He was due back in the cockpit at 0200, as described by other AF crew familiar with procedure on this flight, as I recall.
cheers
bear