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.

A savage predator goes on a homicidal rampage with a savage triple murder along with an abduction of two young siblings from their home in the middle of the night. The children quickly decide they will do whatever is necessary to survive.

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.

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.

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 1984, a slew of brutal hammer attacks leaves a Colorado community in fear. It takes nearly 40 years before a serial killer is brought to justice.

The murder of James Byrd, Jr. throws his family into turmoil as law enforcement investigates one of the most gruesome hate crimes in U.S. history.

[The Keddie Murders] 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.

[Los Angeles Serial Killer] 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.

During an armed robbery, a father of three is fatally shot, but for 23 years, another family questions if the wrong man is behind bars.

In 2011, a husband returns home to find his wife dead on the living room floor. He tells first responders she committed suicide, but it was murder. Police zero in on the husband and what unfolds is one of the most outrageous tales in recent history.

In 2020, Baron Li is shot nine times in front of his house. Detectives scramble to figure out who could want this loving husband and father dead. When they hone in on two teenage suspects, police struggle to identify their motives and connection to Li.

In 1975, someone abducts three young girls, stabbing them and leaving them for dead in a field; the Indiana Slasher evades capture, leaving his victims haunted for decades until new technology uncovers his true identity.

[Mystery in Texas] In 1995, 16-year-old Adrianne Jones is found shot to death in Grand Prairie, Texas. A model student and athlete, there seems to be no reason for her death. Police investigate boyfriends, neighbors and local troublemakers, but don't have any strong suspects. The case grows cold, until nine months later when a game of Truth-or-Dare leads to a startling confession and an over-achieving relationship that went murderously awry.

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.

When neighbors find a young teacher axed to death on Friday the 13th, a sleepy suburb fears a psychopath is loose; the bloody crime scene leads police to a most unlikely suspect, unfolding a story people still have to see to believe 40 years later.

A deadly fire in a small Illinois town raises questions as to whether it was a tragic accident or murder; the ensuing investigation uncovers a web of lies and deceit that results in one woman and her unborn child's life coming to a violent end.

[A Ghastly Discovery] 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.

[Murder in Alaska] 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.

In January 2020, a Mennonite woman goes missing from her small religious community. They find her body, but forensic evidence leads them to a dead end, stymieing law enforcement. Detectives get creative in an effort to find their suspect.

In 1972, police find a young woman fatally stabbed in her room. Police hunt for her killer, but he seemingly vanishes, and the case goes cold. Decades later, a new investigative technique emerges, and the killer's name turns up in the most unlikely place.

[Gone Without a Trace] 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.

A mother's bond to her daughter is put to the ultimate test when one of them shoots a man dead.

When a young woman goes missing, a rookie police officer's intuition leads to an intense investigation, as they race against the clock to find her.

In May 2002, a couple goes missing in Ocean City, Maryland. It's almost as if they vanished into thin air until a random, late-night burglary leads police to discover a tale of deception, brutality and savagery, the likes of which they have never seen.