When a vivacious young escort, Shannan Gilbert, vanishes on Long Island’s south shore in 2010, her disappearance leads police to discover the bodies of ten other victims dumped by a serial killer.

The discovery of four women’s bodies on Gilgo Beach was just the beginning. But who is the Long Island Serial Killer? Investigators uncover multiple suspects and shocking theories, as they race to capture this prolific killer before he strikes again.

In 2011, a 10-month-old baby girl goes missing from her home in Kansas City. The family fears she’s been kidnapped by a drifter, only to be accused by the police of being responsible for her disappearance.

Outgoing Jackie Galloway is found strangled and bound with ritualistic knots. Police investigate suspects in her inner circle but are shocked when a chance encounter with a prowler leads them to discover the murderer is a budding serial killer.

A mother and three teens are murdered in the remote town of Keddie, California. Despite a trail of suspects and illicit activity, no one was ever brought to justice. But recently discovered evidence may be the key to finally cracking case.

In 2012, hikers in Los Angeles’ Hollywood Hills discover the severed head of Hervey Medellin, a retired flight clerk. The cast of suspects includes former lovers, drug cartels and a murderous porn star, in a tale of lust, greed and butchery.

In 1995, bright 16-year old student Adrianne Jones is found shot to death in Grand Prairie, Texas. Police don’t have any strong suspects, until nine months later when a game of Truth-or- Dare leads to a startling confession.

Six-year-old beauty queen JonBenet Ramsey is found murdered in her Boulder, Colorado home in 1996. Investigators try to unravel if she was killed in a kidnapping-gone-wrong, by a home intruder or by one of her own family.

A lone survivor is the only witness who can help police track down a serial killer known as the Grim Sleeper, who preys on women in South Central Los Angeles. After decades of searching, police hone in on an unlikely suspect.

In 2004, the small town of Craig, Alaska is shocked when police discover the charred body of beloved mother and wife Lauri Waterman. People have no idea who would want to kill her, until an unlikely witness reveals a sordid story of secrets and lies.

An army surgeon, Jeffrey MacDonald, is the lone survivor of a brutal 1970 home invasion that claims the lives of his wife and daughters. But authorities doubt his story of murderous hippies and believe MacDonald is the culprit.

The Golden State Killer's reign of terror is over. Law Enforcement have finally located and apprehended the suspected serial murderer who's held the nation in a grip of paralyzing fear since the 1970s.

A young couple enjoys an impromptu camping trip in Leadore, Idaho, until their 2-year-old son suddenly vanishes. Investigators and private detectives work around the clock to find the missing boy, only to point the finger back at the parents.

When a young family suddenly vanishes from their Southern California dream home, friends and family are left with dozens of unanswered questions. Authorities suspect they fled the country, until an unlikely source uncovers the truth.

One summer night in 2007 comes as a nightmare for the Petit family when woken up by two strangers in their quiet, peaceful home of Cheshire, Connecticut. Suddenly this family of four finds themselves held hostage and in a fight for their lives.

Sherri Rasmussen and John Ruetten are enjoying newlywed life until one morning in 1986 when Sherri calls into work sick. That night John returns home, only to find her murdered. Years later, detectives discover her killer was too close for comfort.