Catherine was last seen leaving her Oconomowoc High School prom during the early morning hours of June 5, 1974. The prom was held at the Concord House dance hall, on an Interstate 94 interchange in Concord, Wisconsin. She got into an argument with her boyfriend at 3:00 a.m. She stepped out for a breath of fresh air and never returned. She has never been heard from again. Six years after Catherine's disappearance, the bodies of a couple, both nineteen years old, were found in a wooded area a month after they vanished from the parking lot of Concord House after a wedding reception. Due to the similarities, there was some speculation that their murders and Catherine's disappearance were connected. In 2009, DNA evidence led to the arrest of a suspect, Edward "Wayne" Edwards, in the double murder. Authorities don't believe Edwards was involved in Catherine's disappearance.