When a hostile online feud turns deadly, detectives’ hunt for a mysterious CIA operative leading to the discovery of a jaw-dropping and vengeful catfishing scheme.

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The story of Kenneth McDuff, the only man in Texas history to be sentenced to death for murder, paroled, arrested and convicted of murder, and re-sent to death row. While it is confirmed he killed 9 people, he may have killed as many as 14.

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On June 3rd, 1986 at a hotel in St. Louis, Edward and Julie Post are in town from New Orleans for a real estate convention. Julie Post drowns in the bathtub of their motel room while Edward goes out for an early morning jog. Investigators initially thought the drowning to be accidental. But as they learn of Edward Post's financial debt and the insurance money that he was going to collect from the death of his wife they take a much closer look, and discover what they believe is a motive for murder.

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When 18-year-old Conrad Roy is found asphyxiated in his pickup truck, his death is quickly ruled a suicide. But as detectives retrace Conrad’s final moments, a trail of texts left behind on his cellphone reveal a toxic teenage romance between him and 17-year-old Michelle Carter, turning the investigation upside down. But in an unprecedented case, in which Michelle stands accused of Conrad’s murder and prosecutors allege that her words were deadly weapons, there is no state law to lean on. Up against 317 pages of damning text messages, the defense must rely on an unusual defense to convince the judge of Michelle’s innocence.

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Barbara Stager is convicted of murdering her second husband after being acquitted of killing her first.

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How the double-jeopardy law prevented confessed killer Melvin Ignatow from serving time in the death of his fiance.

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On the outside, veterinarian Valerie McDaniel and her boyfriend Leon Jacob look like they have it all. But in February 2014, Houston police receive a tip from a conscientious bail bondsman that a murder-for-hire plot is in the works and a woman’s life may be in danger. What ensues is a high-pressure police sting operation, the performance of an investigator’s career, a staged kidnapping, and a shocking suicide that leads to an explosive trial in which the defendant’s own words come back to haunt him. Features interviews with the bail bondsmen who tipped off police, the cop who went undercover to protect the lives of the intended victims, as well as prosecutors and defense attorneys and actual footage from the undercover sting operation.

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American Justice highlights the 1980 murder of Michigan woman Shannon Mohr, whose killer was caught because of her family's unwavering efforts.

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