On July 18, 1981, a small aircraft flying from Port Walter to Port Lucy in Alaska failed to arrive. On board were 26-year-old Randall Riddell, who had brown hair and blue eyes, along with Judy Riddell, Norman Riddell, and Rob Mourant. The plane was reported overdue to the Alaska State Troopers in Juneau when it did not land as expected.

No wreckage has ever been located and the four occupants were never found. They are officially listed as missing; they are presumed deceased but the case remains open with the Alaska State Troopers. The rugged terrain, dense forests, and unpredictable weather of the route are noted factors that complicated searches and may have concealed evidence.

What details about the flight, the aircraft, or the last known communications might help bring new information to light for this long-unsolved disappearance?