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What happened in the final days of Gabby Petito's life? In this gripping true-crime series, her loved ones reveal the untold story of her tragic murder.

The notorious Cecil Hotel grows in infamy when guest Elisa Lam vanishes. A dive into crime's darkest places.

Suicide, murder... or something else? This docuseries examines chilling truths and theories around the deaths of 11 members of a Delhi family.

A young mother’s mysterious death and her son’s subsequent kidnapping blow open a decades-long mystery about the woman’s true identity, and the murderous federal fugitive at the center of it all.

He dined with the powerful. He preyed on the vulnerable. Beneath a smiling exterior was the horrifying darkness of a sadistic serial killer.

After the death of her daughter at the hand of her boyfriend, Marisela Escobedo began to fight for justice not only against the murderer but also against the corrupt Mexican judicial system.

The line between justice and revenge blurs when a devastated family uses social media to track down the people who killed 24-year-old Crystal Theobald.

Filmmaker Liz Garbus investigates the mysterious tragedy of Diane Schuler in an effort to understand what went wrong.

Police pull over a woman who claims she just gave birth. But the baby — and the blood — aren't hers. Twisted lies unravel in this true-crime documentary.

In 1994, a 13-year-old boy disappeared without a trace from his home in San Antonio, Texas. Three-and-a-half years later, he is found alive in a village in southern Spain with a horrifying story of kidnap and torture. His family is overjoyed to bring him home. But all is not quite as it seems.

In 2001, Andrew Bagby, a medical resident, is murdered not long after breaking up with his girlfriend. Soon after, when she announces she's pregnant, one of Andrew's many close friends, Kurt Kuenne, begins this film, a gift to the child.

For five years, from 1975 to 1980, the Yorkshire Ripper murders cast a dark shadow over the lives of women in the North of England. 13 women were dead and the police seemed incapable of catching the killer. No one felt safe – and every man was a suspect.

A chilling 911 call. A gruesome scene. What really happened inside a family's quiet suburban home? Murder or self-defense? Told from both sides, this documentary explores Jason Corbett's brutal death.

British documentarian Nick Broomfield creates a follow-up piece to his 1992 documentary of the serial killer Aileen Wuornos, a highway prostitute who was convicted of killing six men in Florida between 1989 and 1990. Interviewing an increasingly mentally unstable Wuornos, Broomfield captures the distorted mind of a murderer whom the state of Florida deems of sound mind -- and therefore fit to execute. Throughout the film, Broomfield includes footage of his testimony at Wuornos' trial.

An exploration of the case of the Golden State Killer who terrorized California in the 1970s and 1980s, committing 50 sexual assaults and 10 murders, and true crime author Michelle McNamara's obsessive quest to find justice on behalf of his victims.

The documentary takes a detailed look at the disappearance of 3-year-old Madeleine McCann, who vanished while on holiday with her family.

Realizing the urban legend of their youth has actually come true, two filmmakers delve into the mystery surrounding five missing children and the real-life boogeyman linked to their disappearances.

Child abuse, mental illness, and forbidden love converge in this mystery involving a mother and daughter who were thought to be living a fairy tale life that turned out to be a living nightmare.

After a woman's at-home DNA test reveals multiple half-siblings, she discovers a shocking scheme involving donor sperm and a popular fertility doctor.

This docuseries examines the decades-old murder of Sister Catherine Cesnik and its suspected link to a priest accused of abuse.