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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This episode originally aired April 16, 2018. A couple is found dead in their Washington home and all signs point to a professional hit. A palm print and two distinct shoe impressions help police separate fantasy from reality and expose a fatal flaw in one state's inmate release procedures.

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This episode originally aired April 12, 2018. The woman hadn't shown up for work in two days, and her boss reported her missing. When her body was found, the evidence pointed to suspects who claimed they had nothing to do with the crime. The victim, herself, would help police to prove they were lying.

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