In Sacramento, Calif., law enforcement officials arrest a suspect in the Golden State Killer case, bringing an end to the serial murderer's reign of terror.
In the premiere of the true-crime series, the search for a missing escort leads the police on Long Island to discover the bodies of 10 women believed to have been murdered by the same killer.
The discovery of four women's bodies on Gilgo Beach is just the beginning, as investigators uncover multiple suspects and shocking theories while racing to identify the Long Island Serial Killer before he strikes again.
The mystery surrounding the disappearance of a 10-month-old girl from her Kansas City, Mo., home is examined. The family fears that she was abducted by a drifter, but the police suspect that someone within the family may be responsible.
Police question suspects in the inner circle of Jackie Galloway, a woman found strangled and bound with ritualistic knots; a chance encounter with a prowler leads them to the shocking discovery of a budding serial killer.
A long-cold case that may be heating up is examined. In 1981 Keddie, Cal., the investigation into the murders of a woman and three teens hits a wall. Fast forward three decades and recently discovered evidence may be key to cracking case.
Hikers discover the severed head of Hervey Medellin in the Hollywood Hills; the suspects include former lovers, drug cartel hit men and a porn star in this tale of lust, greed and butchery.
The 1995 murder of a 16-year old girl in Grand Prairie, Texas, goes unsolved for nine months, when a game of truth-or-dare leads to a startling confession.
An examination of the JonBenét Ramsey murder case. The 6-year-old beauty pageant winner was murdered in her family's home on Dec. 26, 1996. Included: whether 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 preying on women in South Central Los Angeles; after decades of searching, police hone in on an unlikely suspect.
In Craig, Ala., townspeople are shocked when police discover the charred body of beloved mother and wife Lauri Waterman; people have no idea who would want to kill her, then an unlikely witness reveals a sordid story of secrets and lies.
A brutal 1970 home invasion claims the lives of Army surgeon Jeffrey MacDonald's wife and daughters, leaving him the lone survivor; authorities doubt his story of murderous hippies and believe MacDonald committed the crime himself.
In the 1970s a serial rapist is on the loose in northern California; then, as his reign of terror over the community wanes, police discover he isn't just a serial rapist, he's a serial murderer and he's been killing people all over California.
A young couple's toddler vanishes while the family is enjoying an impromptu camping trip in Leadore, Idaho; investigators and private detectives work around the clock to find the missing boy, only to come back to his parents.
When a young family 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, the Petit family is woken up by two strangers in their quiet Connecticut home; suddenly, these four family members find themselves being held hostage and in a fight for their lives.
Sherri Rasmussen and John Ruetten are enjoying newlywed life until one morning when Sherri calls into work sick; that night, John returns home to find his wife murdered; years later, detectives discover Sherri's killer was too close for comfort.
A premiere fishing boat explodes into flames just off shore, stunning the small fishing town of Craig, Alaska; after fighting the flames, state troopers discover the remains of a young family and few clues as to could have set the ship blaze.
In Florida, friends and family are stunned after an esteemed criminal law professor is executed in his garage; investigators follow a series of leads taking them on a statewide hunt in search of the murderous masterminds.
After a young couple goes missing, detectives find a clue leading them to a strange storage container in the middle of 95 acres, and what's inside unlocks the secrets of a monster hiding in plain sight.
In 1984, the body of a 14-year-old girl turns up on the beach in San Diego and police think it relates to the murder of another teen; a clue yields an unbelievable suspect.
In 1980, Tim Hack and Kelly Drew go missing from a small Wisconsin town, then their bodies are found in a field; a woman comes forward nearly 40 years later to help solve the so-called "Sweetheart Murders'' of Hack and Drew.
Shock sweeps through a Washington community when a suburban mother gets arrested for a murder from a decade earlier in Alaska; details of a seedy and sordid past emerge.
Police investigate the shooting of millionaires Brad and Andra Sachs in their home in 2014 and track a series of clues in a chase to find the couple's killer.
After a fire chief's wife's burned body is discovered, an autopsy reveals she died from a gunshot wound to the head, and the arson investigation turns into a hunt for her killer.
In 1998, a gifted Philadelphia graduate student is found murdered in her bed, triggering a hunt for her killer.
When an 11-year-old Arizona girl vanishes while waiting for an ice cream truck, it's clear she's been abducted; the search for her leads to a trail of suspects, making it the largest missing child investigation in Arizona history.
A 12-year-old girl goes missing on her way to school in Oregon City, Ore.; the police investigation offers little in the way of leads, then a second girl disappears.
The morning of his anniversary, Mike Williams goes duck hunting. When he fails to return home that afternoon, an all-out search commences. But it's only the beginning of a sordid mystery that will take close to 20 years to solve.
In the summer of 1980, a popular teen goes for a run around her hometown in Maine. Days later, her savagely beaten body is found. But what happened remains a mystery for years, until her mother intervenes and forces police to reexamine the case.
When three women from three different decades meet their death or go missing under mysterious circumstances, authorities are forced to examine the one thing they had in common: they all fell in love with the same man.
A celebratory night turns deadly for a Texas family when they are gunned down at home. When investigators uncover a conspiracy, it will test one man's ability to forgive as he fights to save the criminal mastermind from the death penalty.
In York, Pa., race riots claim the lives of an African-American mother and a young, white police officer; their deaths are largely forgotten until 30 years later when their cold cases are reopened, revealing the city's dark past.
In Philadelphia, police make a horrific discovery 18 months after a woman goes missing; the police pursue the woman's killer, but he always manages to stay one step ahead of the law.