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For more than forty years, Kim Parmer has been haunted by the prospect that someone murdered her cousin, Sandy Beal, in 1977. Award-winning reporter Melissa Jeltsen investigates the mysterious death of a teenage girl in Prince George's County, Maryland.

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• The story that brought Kim to Melissa

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Unbeknownst to her parents, Sandy Beal was secretly dating a married state trooper at the time of her death. The letter she left him in her car leaves her family with more questions than answers.

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A journal entry sheds light on Sandy’s desires to be a police officer. When she suddenly dies, the homicide detective tasked with her case is inundated with strange phone calls.

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The exact nature of Sandy's relationships with local police officers comes under new scrutiny.

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Sandy’s newly released police file reveals that she sought help from law enforcement months before her death.

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The Beals' distrust of police leaves even the most basic facts about Sandy's case up for interpretation.

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Sandy’s cousin Kim meets with a cold case detective who offers her something unexpected - and transformative.

If you or someone you know is considering self-harm, please contact the National Suicide Prevention Lifeline at 1-800-273-8255, or text "STRENGTH" to Crisis Text Line at 741-741

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