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On a crisp fall day in October of 1991, Patricia Scoville set out for a bike ride on the scenic Moss Glen Falls trails in Stowe, Vermont. When she hadn\u2019t returned home more than two days later, Patty\u2019s roommate reported her missing, triggering a search and rescue effort that soon morphed into a homicide investigation.\n\nThe case that unfolded baffled investigators for almost two decades, but the person responsible for Patricia\u2019s death could only hide for so long. Thanks to efforts by Patty\u2019s parents, police got a new investigative tool that would lead them right to the killer\u2019s doorstep.