Catherine Cathy Davidson was six when she vanished from a family outing the Labor Day weekend of September 1, 1973. The father, Robert Davidson, and stepmother, Anna Young, told police the family had picnicked at Warren Dunes State Park in Sawyer, Michigan, and that Cathy and five older siblings had gone to play near a creek flowing into Lake Michigan; the other children returned but Catherine did not. She was described as 3 feet 10 inches, about 70 pounds, with black hair braided in tight rows and brown eyes, last seen wearing a white blouse, blue shorts, and white sandals. A multi-day search by the Michigan State Police turned up only a pair of green panties that were never confirmed to belong to her.

Years later a sibling report surfaced alleging Catherine had actually died at the family’s Chicago home and been hidden in a closet, a claim that shifted scrutiny toward Anna Young. Anna Young was later convicted in the deaths of two other children and died in prison in 2021. The location of Catherine’s remains and the full truth of what happened remain unknown.

Did anyone who knew the Davidson family then or later ever hear details that could locate Catherine or confirm where she was when she disappeared?