Mary Elizabeth Quigley (February 28, 1960 – September 10, 1977) was an American murder victim whose death was a cold case for nearly 30 years before it was finally solved. Mary was a senior at Santa Clara High School in California. She had attended a beer party and left late in the evening of Friday, September 9, 1977. Her body was found the next day approximately 300 yards away, hanging from a chain-link fence in Washington Park (now War Memorial Park) in Santa Clara. Coroner's evidence indicated that she had been raped and strangled.