In this episode, Part 1 follows the disappearance of 18-year-old Anna Alessiawitz after one last summer weekend at the Jersey Shore turns into the case that exposes a monster. What starts with a girl waiting on a boardwalk bench, her shoes and purse left behind, and remains found months later behind a Burger King quickly turns into Richard Biegenwald’s violent past, his shocking release from a life sentence, a witness who knew too much, and an Asbury Park apartment hiding weapons, drugs, a secret room, and a nightmare police never saw coming.

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