On the evening of May 28, 1971, 27-year-old Martha Sue Shelton and her 37-year-old husband Claude left their Gerry’s Trailer Park home on 18th Street in Corbin, Kentucky, after putting their three young children to bed. The couple told their oldest daughter they were going to King’s Truck Stop about five miles away; they left in a white 1967 Ford Galaxie 500 and were never seen again.

Sue’s purse and one of Claude’s paychecks remained in the trailer, and a bowl that usually held about $600 in cash was found empty. No one at King’s Truck Stop recalled seeing the Sheltons or their distinctive car that night, and the Ford Galaxie has never been located. A 2009 DNA test on an unidentified body found in Oregon ruled out Sue.

Investigators have long suspected foul play because abandoning their children was out of character; the children were raised by their grandmother. Does anyone have information about the car, King’s Truck Stop that night, or the Sheltons’ movements on May 28, 1971?