India, Dec. 20 -- The Cessna C550, registered to a company operated byGreg Biffle, crashed just outside Statesville Regional Airport while attempting to return shortly after takeoff on December 18, killing all seven people on board.

In its first significant public update, the NTSB highlighted that investigators still cannot confirm who had control of the jet when it went down.

Investigators have recovered the black box, which "could provide important clues about what happened," but officials have not yet established who was piloting the plane.

It specifically states that three of the occupants had pilot licenses, including Biffle, Dennis Dutton and his son Jack. Yet it remains unclear who was flying at the time of the crash.

Federal A...