Well, assuming he has a digital camera or was using a phone, they should have been able to gather some useful info from the photo(s). If it was a phone, it may have had the exact GPS coordinates of where he was when she headed back to camp and showed his route back, so they’ll have a more accurate path to follow. If it’s a digital camera, they should be able to pinpoint the area by the photos as well as the time the photos were taken, to help narrow down the time frame in which she went missing.
Hopefully it will help somehow.