Lillian Eileen DeMaris was 31 and a widowed mother of three when she vanished from Mason City, Iowa, on August 14, 1952. Employed as a food vendor with a traveling carnival, she promised to take her eldest daughter to a birthday dinner that day but never returned. Her vehicle was later found abandoned outside the carnival grounds.

Born in Nebraska as one of ten children, DeMaris had moved to Iowa as a child and lived for a time in Killeen, Texas, during the 1950s. Her husband had died in a construction accident in Minnesota, leaving her to care for daughters aged 6, 4, and 2. The family did not report her missing right away because they feared the children would be taken into state custody. She has been declared legally dead, but the case remains unsolved and few details are known.

Did anyone who worked with the carnival or lived near the grounds in Mason City in August 1952 ever hear or see anything that could help explain what happened to Lillian?