Robin Stone, 17, was a good student with a close-knit family. When she became pregnant, Robin told her parents that the father was a boy from school she had been dating. On August 27, 1991, Robin was seven months pregnant when she received a call. She told her mom she was going to help a classmate with homework. It was the last time her mom saw her alive. Robin's car was found later that evening, but there was no sign of her. A missing persons investigation quickly got under way, but it wasn't until December 28, when hunters stumbled upon Robin's remains, which were so badly decomposed that cause of death could not be found. When Sheriff Michael McCauley was elected in 2000, he put a renewed focus on cold cases and assigned Detective Sam Williams to Robin's case. Detective Williams was around the same age as Robin and was attending high school in the next town when she was killed. He remembers the impact it had on the community and is determined to get justice for Robin and her family.