Robert Earnest Horn, 69, of Palmer, Alaska, was last seen August 12, 1989, when he boarded Cessna N1211V for a flight out of the Caribou Creek and King Mountain area. Three other men were aboard: Edgar McCrary, James Slaybaugh, and Richard Floyd. The small plane never reached its destination and all contact with those aboard was lost.

After extensive searches, wreckage from the Cessna was found August 16, 1990, in a ravine about one mile southwest of Hicks Lake. The discovery confirmed a crash, but the remains of Horn and the three other occupants were not recovered and they remain listed as missing. The circumstances of the crash and what happened afterward have not been publicly detailed.

Did anyone in the area at the time have information about flights in the Caribou Creek–King Mountain region in August 1989?