Anne Lillian Riggin, known as Annie, was 25 when she was last seen at her home in the vicinity of the 1200 block of 2nd Street in Harrisburg, Pennsylvania, on May 28, 1982. She was described as petite, 5 feet 3 inches, about 115 pounds, with light brown hair, blue eyes and a small scar just above her left eye.

There were no signs of a struggle at the residence, no witnesses to any foul play, and investigators quickly encountered a lack of physical evidence. The Pennsylvania State Police report that the trail grew cold early; over the decades the case has remained largely inactive and has not produced significant leads.

The central unresolved question is how a young woman could vanish from her home with so little to follow up on. Anyone who knew Annie, lived in Harrisburg in 1982, or has information about her movements or contacts around May 28, 1982 is asked to come forward.