[VaSteve]

It the plane is found semi intact, they could have divers document the positioning of the bodies, how the controls were set, internal damage to the plane (fire, deployment of masks) and probably a million other things. A pilot bent on creating a mystery could tamper with the crime scene before ultimately crashing of course. I'd hate to by an NTSB type and have to dive 3 miles deep to assess the wreckage.