Two details make Tanisha Watkins disappearance unusually chilling. Tanisha Lorraine Watkins, 2, vanished from the front yard of her family’s mobile home on Thrasher Lane in Austin on January 5, 1984, about 1:30 p.m. She was playing on a swing set; her mother briefly went inside to sweep a rug and looked away. When she looked back, Tanisha was gone.

Searches that day involved dogs, helicopters, volunteers and followed a reported sighting of Tanisha walking with a slender, bearded man wearing a green Army hat along Riverside Drive. That lead did not produce an identification, and authorities say foul play is suspected but no solid evidence has determined what happened. Despite occasional tips and sightings over the years, Tanisha has never been found and the case remains unsolved.

If anyone remembers that day, the mobile home community on Thrasher Lane, or the man seen on Riverside Drive, can you share what you know?