Erin Corwin was a girl from small town Tennessee when she moved across the country to live with her husband, Corporal John Corwin, on a desert Marine base. They were high school sweethearts, young and in love. But less than a year later, Erin disappears. NCIS investigators leap into action, and the search for the missing Marine’s wife begins.

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Erin Corwin, a pregnant 19-year-old Marine wife, was found dead in an abandoned mine shaft in Joshua Tree National Park after weeks of searching. “48 Hours” correspondent Natalie Morales offers unique insights into Corwin’s case, including the NCIS agents’ tireless efforts to uncover her body. Hear a complex story of infidelity and obsession that tore more than one Marine family apart and led to Corwin's tragic death.

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