In 1998, a gifted Philadelphia graduate student is found murdered in her bed, triggering a hunt for her killer.

A 12-year-old girl goes missing on her way to school in Oregon City, Oregon. 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 and vanishes. 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, Pennsylvania, 1969, 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.

In the summer of 2000, bags full of body parts start appearing all over the San Francisco Bay Area. Investigators follow the trail of grisly clues to a secret cult carrying out a sinister scheme.

In 1992, a 19-year-old woman is brutally assaulted outside of Desert Hot Springs, California. Miraculously, she escapes, but lives in constant fear that her assailant will find her again one day, not realizing she has survived a serial killer.

Gallaudet University is the premier college for the deaf in the United States, but this haven of higher learning is turned upside down after two students are murdered in their dormitory rooms.

On a Mississippi back road, a 19-year-old woman is set on fire and left to burn alive. Her last words lead detectives down a road of dead ends and the case goes cold until a special agent taps into her location data and finds a suspect.

In 1969, a woman is found murdered in Los Angeles, but her identity is a mystery. For decades, police investigate, hoping to put a name to the face and find her killer. The one lead that comes up over and over leads them to Charles Manson.

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. The case leads police on a nationwide search as they work to solve this baffling mystery.

So-Cal surfer and tech entrepreneur, Chris Smith, dreams of making a tidy sum of money and then surfing off into the sunset. It seems his dreams have come true, but all is not as it appears.

In 1984, 10-year-old Kevin Collins disappears on his way home and the city of San Francisco is galvanized in an effort to find him. With few leads to go on, his case sheds light on hundreds of other kids who have vanished without a trace in the U.S.

In 1971 and '72, Washington DC is terrorized by a cunning killer who abducts and murders six young African American girls. Police and the community are outraged by the serial killings that target young children in their own neighborhoods.

Art imitates life when Cambodian genocide survivor Dr. Haing Ngor wins an Oscar for his role in the film The Killing Fields. But when he's gunned down, the LAPD investigate a web of political intrigue, revenge, and street gangs to uncover the truth.

In July of 2010, NBA star and family man Lorenzen Wright goes missing outside of Memphis, TN. When his dead body is discovered in the woods, investigators find that this case is far from a slam dunk.

A double murder involving the family of a federal judge will lead the FBI, US Marshals, and Chicago PD on an investigation of epic proportions. But when law enforcement finds the end of the trail, they learn the death count may climb higher.

In 1988, a young woman is found murdered in her Modesto, CA, home, leading police to investigate the strife and infidelity in her marriage. A surprising witness eventually comes forward.

When a widower and father of three is found murdered outside his Long Island home, police have reason to look into shady business dealings as a possible motive. Then, a tip leads to three unlikely suspects, exposing dark family secrets.

Right before Thanksgiving, two masked gunmen reportedly invade a couple's home and kill the husband; with few leads, police use ballistics, forensics and neighborhood gossip to solve this cold-blooded murder.

After doting mother Cheryl Coker vanishes from Riverside, OH, numerous searches turn up nothing; as police take a closer look at the case, they uncover some disturbing information.

A senseless murder rocks an African-American neighborhood in 1970s Detroit; police arrest suspects who are ultimately convicted of murder, but 47 years later, the truth finally emerges to right history's wrongs.