This episode originally aired February 11, 2019. When a Massachusetts man dropped dead of an apparent heart attack, no one thought foul play was a possibility until police looked into his girlfriend's odd behavior in the days before his death.

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This episode originally aired February 7, 2019. Emelita Villa came to Arlington, Texas from the Philippines as a shy, impoverished, 18-year-old mail order bride for Jack Reeves, a man almost 30 years her senior. Six and a half years later, Emelita disappeared.

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This episode originally aired February 4, 2019. A woman is found dead in a ravine near a jogging path. Crucial crime scene evidence had been washed away by severe thunderstorms. Then, almost 20 years later, two pieces of newly-discovered evidence brought the killer to justice.

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This episode originally aired January 31, 2019. A man accused of killing his estranged wife insisted she committed suicide. Investigators said it was murder. The evidence was interpreted differently by the defense and prosecution. It was up to the jury to decide.

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This episode originally aired January 28, 2019. In 1993, the Amtrak Railroad experienced the deadliest train crash in United States history when the Sunset Limited derailed while crossing Alabama's Bayou Canot bridge. Forty-seven passengers and crew were killed; scores more were injured. The clues to the cause of the crash lay etched in twisted steel and buried in the mud of the Bayou Canot.

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This episode originally aired January 24, 2019. Firefighters find an entire family dead inside their burned-out home, and at first glance, it appears to be a case of murder-suicide. But clues found at the scene soon lead investigators to believe otherwise. Forensic science, a time card, a drawing, and an audiotaped diary help prosecutors to build their case, and bring the killer to justice.

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This episode originally aired January 21, 2019. A highway patrolman was dispatched to what he thought would be a routine traffic accident... until he looked in the car. While he had no formal training in forensic science, he had seen hundreds of accidents - but never as much blood as this. He was shocked by the coroner's ruling of "accidental death," and then an anonymous phone call breathed new life into his investigation.

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This episode originally aired January 17, 2019. The investigation into the disappearance of Helle Craft led to the murder conviction of her husband.

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This episode originally aired January 14, 2019. After eluding police for years, a model citizen in Olney, Texas is fund to be a serial killer.

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This episode originally aired January 10, 2019. A speck of bicycle paint and a speck nickel tie a suspect to the murder of a 9-year-old.

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