Also, I have to mention, since he knows the doe was hit, 4 hours is marginal and believe more time should have been spent looking for it. Having tracked many of my friend's deer they shot, I believe the main reason tracking was hard is because they went after it too soon after the shot. Unknown shots or marginal hits should have the shooter wait for a longer while to follow up and to err on the side of being more careful, leaving over night to start the tracking, weather permitting, is usually a good thing.
iSnipe