McCullough was last seen at her family's Silver Creek Falls, Oregon on June 21, 1941. She woke up early in the morning before her sisters were awake, dressed, and took a bucket outside to get water from the nearby pump. McCullough never returned home and has never been heard from again.

Other individuals had disappeared in the same area before. An adult man, Herbert Brown, disappeared from the vicinity six years prior to McCullough's disappearance, and was never found. Photographs and vital statistics for him are unavailable. Early in the century another person also disappeared from the Silver Creek Falls area.

McCullough's family members were migrant workers in 1941, and were picking berries at the time she disappeared. Few details are available in her case, which is now longer being investigated by law enforcement due to the passage of time.