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A beloved grandpa is found dead in his van on Halloween. Detectives find they are on the trail of someone who has most likely killed before.

A teenager is arrested after his mother finds the body parts of a missing drifter in his bedroom. Police uncover that the suspect idolises infamous serial killers.

On Halloween, 11 operators receive a chilling call from a teenager claiming he killed his parents. Police race to the scene and discover a burgeoning psychopath.

When a hole appears in the backyard, Delila Yang becomes suspicious of her mother. She works with police to unearth her mum's sinister secrets.

William Cosden Jr. coerced sisters, Karen and Susan, into keeping secret what he did. They reunite to repair the trauma keeping those secrets caused them.

Part 2. Death row inmate John Hummel agrees to a final interview weeks before his execution.

While being questioned on the abduction of a barista, a local businessman makes a deal with police to reveal a secret life as a serial killer.

When a 50-year-old woman is found dead in her home, all that's left behind is a note that reads, 'Chase me.' Police search relentlessly for the remorseless psychopath.

Three locals are found brutally murdered in a quaint village in Maine. The killer leads detectives into the woods, where he buried his fourth victim.

On June 6, 1992, Suzie Streeter and Stacy McCall are out celebrating high school graduation. By morning, the teens are missing, along with Suzie's mother.

Entrepreneur Chris Smith moved to Southern California with dreams of sand and success. After making a fortune, he decides to travel the world, but he never returns home.

When a woman takes a job as a prison nurse, she has an illicit affair with an inmate. But when their love is discovered they take drastic action to stay together.

Harold Shipman was a much-loved doctor. Millions watched the GP speaking on TV discussing the benefits of care, not knowing he'd already killed dozens of patients.

Eight-year-old Jamie Lavis was on the bus Darren Vickers was driving before he disappeared. Vickers joined the hunt and spoke on TV - but was hiding an awful truth.

David attends one final meeting before driving home to visit family. But soon after, his truck is found abandoned. How did David just vanish into thin air.

In Twinsburg, Ohio, Charlene Puffenbarger's three-year-old son is the only witness to her brutal murder. An unexpected source leads them to the killer.

Susan and Michael are happily married until a drastic change in his personality prompts Susan to file for divorce. How far will Michael go for revenge.

When Cory met Bobbi Ann, she was perfect. But months later, with his bank account drained and his career on the line, Cory uncovers Bobbi's dark past.

John fell in love with Tina despite her past drug addiction. But 10 years later, Tina's demons resurfaced, leading to an ugly divorce and a contract on John's life.

Elden was looking to spend his golden years with a good woman like Shirley. But after two years of marriage, he discovers she wanted much more than his heart.

Former Harlem Globetrotter Rico Harris is driving to Seattle and mysteriously vanishes. Investigators embark on a journey that grows more baffling as time passes.

When an Ohio couple is found dead in their ransacked home, detectives turn to the community for help. Can investigators uncover the truth of what happened.

A group of girls begin lifelong friendships at church camp. Life takes them down different roads and their bonds remain until one of them disappears.

When a Homecoming Queen and a Dairy Princess are murdered in Marathon County, Wisconsin, detectives question a pool of suspects, from strangers to frenemies.

When a woman's millionaire boyfriend reports her missing, police have little to go on in their search. An unlikely witness appears, uncovering a web of deceit.

A popular resident of Eastman, Georgia, mysteriously disappears. As the search for him intensifies, police make a horrific discovery and focus on an unlikely suspect.

A man tries to fool a TV show into awarding him money. Three years later, he kills his partner then calmly lays a trail of false leads. Experts uncover the truth.

Where's Emily? A Vermont anniversary trip turns dark as a romantic getaway unravels into secrets, violence, and a camper crime scene.