Three years removed from the murders of Abby Williams and Libby German, the team travels back to Delphi for new conversations, new questions and their own thoughts about what happened out there that day.

Abby and Libby - 2 young girls murdered. Investigators are searching for the killer using their biggest clue: a recording of his voice from one of the victims' phones ordering the girls Down the Hill. Almost three years later, it's a mystery that still haunts the small town of Delphi, Indiana while police say the killer may walk among them.

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