Marie questions how potentially vital evidence goes missing, as Tiffany's mother finds herself at the center of a shocking development. And Marie uncovers a mysterious call answered on Tiffany's cell phone.

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The spotlight turns onto the original investigation as someone at the scene comes forward to reveal what she saw that fateful night. Her account shocks everyone as other experts dispute everything in the official reports.

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Like any teenager, Tiffany's cell phone was the center of her life. Digital detectives unlock Tiffany's phone. And what Marie discovers in the new download is frightening and begins to reshape the entire investigation.

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There was a secret someone special in Tiffany's life. She breaks her silence to reveal her friend's state of mind and cast more doubt on the decision to label her death a suicide.

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Tiffany was popular, with a wide circle of friends. Marie is given unprecedented access to Tiffany's social media and reaches out to those who knew her best. She is shocked by what happens next.

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For Tiffany Valiante the summer of 2015 was about enjoying the beach, the pool and parties before she left for college. But after a family gathering, she was found dead on railroad tracks. Marie retraces her steps that last night and is left with deeply troubling questions.

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When the body of 18-year-old Tiffany Valiante was found on railroad tracks deep in the New Jersey Pine Barrens in the summer of 2015, it was all too easy for police to label her death a suicide. More than a decade later, journalist Marie McGovern takes you inside a remarkable four-year investigation into the terrible tragedy that became a frightening mystery.

This 8-episode series debuts on August 20, 2026.

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