Michele Reidenbach was 16 and a senior at Seneca Valley High School when she vanished from Evans City, Pennsylvania, on September 22, 1981. She attended classes that day and even had her senior picture taken before working an afternoon shift at Mel-Den’s appliance store in nearby Zelienople. Feeling ill, she told her employer she was stepping out to buy cold medicine at a nearby pharmacy; she did purchase the medicine and was last seen in the parking lot of the adjacent Super Duper supermarket. One witness reported seeing her speaking with someone in a red car.

Her purse and schoolbooks were left behind at the store. Family members insisted she would not have run away—she was described as responsible and devoted to her ailing sister, and she had over $100 saved at home for a class ring. Police questioned her boyfriend, who passed a polygraph and was cleared; her family was also ruled out. The Pennsylvania State Police continue to list the case as open. If anyone has information about Michele’s movements that afternoon or remembers the red car, please come forward.