Watch Cold Case Files

Just after the last day of school in 1984, 15-year-old Reesa Trexler is found murdered in her grandparents' home. For decades, a stalled investigation only fuels the town rumor mill, pointing an accusing finger at Reesa's 13-year-old sister, Jodie.

Easter Sunday of 1992, the body of missing woman Lisa Ziegert is found in a field. The investigation yields hundreds of leads but no true suspect. After more than two decades on ice, the case is revived when DNA phenotyping puts a face to the killer.

On a bitter morning in 1980, radio intern Helene Pruszynski is found brutalized in a snowy field. After 37 years of fruitless leads, investigators tap into a public genealogy website that leads them across the country to the killer they've been hunting.

Near what's known as the hanging tree, the mutilated body of Timothy Coggins is found in late 1983. The investigation is thwarted and the case freezes for over 30 years until a newly elected sheriff vows to bring the killers to justice.

23-year-old teacher Irene Garza was a former beauty queen and devout Catholic who vanished the evening before Easter after giving confession. Residents of her close-knit border town did their best to find her, but after a series of false leads, her body was found floating in a drainage canal clearly the victim of a violent sexual predator. At the time, a key witness hinted that a member of the Catholic clergy may have been responsible, but the clue remained buried for 42 years until a former priest comes forward with a damning confession from another man of the cloth that reveals a sinister coverup.

Women from small towns along the Mississippi River were killed in 1980s and the case remains unsolved up to this day.

When 25-year-old schoolteacher Christy Mirack is found brutally murdered in her Lancaster, Pennsylvania, apartment in 1992, there is no shortage of suspects. Frustration and fear mount as each person is ruled out, one by one, and eventually the case goes cold. Twenty-six years later, in 2018, cold case detectives get a break when a relative of the killer uploads DNA to a public genealogy website. This story features a rare interview with the victim's brother and the forensic genealogist who helped crack one of state's first cold cases to be solved by familial DNA technology.

When Sherry Leighty goes missing in 1999, her family is left wondering how a dedicated mother of three could vanish without a trace. A decade later, the cold case heats up when Sherry's sister launches a social media campaign to help solve her sister's mysterious disappearance. An online tip unearths the killer truth and a sinister family secret. Featuring an interview with Shelly Leighty, who never gave up on solving her sister's case, along with rare home video of Sherry and her family.

When 36-year-old computer programmer Lisa Valdez fails to show up for work, her apartment manager finds her brutally murdered in her tiny studio. Her body is riddled with stab wounds, the walls are covered in blood. Evidence shows the killer cut off her long, dark hair, taking it as an apparent trophy.

When 31-year-old real estate appraiser Mike Williams mysteriously vanishes while duck hunting in the Florida swamps in December of 2000, authorities suspect he accidentally drowned. For sixteen years Mike's disappearance remains a mystery. The case heats up when police receive a distress call from the victim's wife in 2016. Featuring interviews with detectives and the victim's mother as well as rare footage of the crime scene and recorded audio confessions with the accused, the episode explores how the disappearance unfolded into a sinister plot to cash in on millions of dollars of life insurance.