14-year-old Alana Calahan's body was found in the woods at the back of her house. Alana's mother and sisters discuss this tragedy for the first time.

A shooting in a luxury building sends shockwaves through an upscale neighbourhood. Detectives uncover a list of suspects and a plot born out of economic envy.

In 1995, Christa Pike was introduced to Satanism. Her fascination with the dark underworld grows until it comes to a deadly head in the woods one night.

Gripping clips of the most shocking crimes that went viral. From kidnappings to break-ins to wild car chases, these are the wild stories behind the videos.

Gripping clips of the most shocking crimes that went viral. From kidnappings to break-ins to wild car chases, these are the wild stories behind the videos.

Talented artist Kira and marketing manager Matthew appear to be happily married. Until one day, a maintenance worker makes a grisly discovery.

Krystal Baker is found dead on a riverbed. The mystery is only uncovered 16 years later, opening up a Pandora's box of lies, jealousy, and violence.

Loving mother Andrea White suddenly disappears and is discovered in a swamp. How will the police uncover the identity of her two-faced killer?

A community in Kentucky is devastated when a student is assaulted and burned in her college dorm room. Police find two suspects with very different stories.

After a Tennessee fisherman finds a woman's body floating in a creek, family secrets, decades-long feuds, and a suspicious funeral suggest a complex conspiracy.

When David Lunz is gunned down in his Florida home, the community fears the worst. It takes investigators more than two years to track down the killer from David's past.

The residents of Boonville are devastated when the body of eight-year-old Alyssa Owen is found. Then another body turns up six weeks later. Who is at large?

Talented artist Kira and marketing manager Matthew appear to be happily married. Until one day, a maintenance worker makes a grisly discovery.

Stephanie is a gifted stage performer and much-loved teacher. But behind closed doors, resentment and envy fester in her marriage, leading to a shocking 911 call.

A teenager reports his family missing after they went on a shopping trip. Investigators discover a burned car with bone fragments inside.

A teenager vanishes from a shop and the hunt for her killer sparks calls for reform. A driver on a shooting spree terrorises a Michigan city.

A woman is set on fire in Courtland, MS. And, after a mum vanishes in Altoona, WI, her body is found 100 miles away. Is her killer closer to home?

When soldier disappears after a night out, an investigator uses a bizarre tactic to find her killer. A news anchor mysteriously vanishes.

A family are discovered murdered in their quiet suburban home. When one victim is found still clinging to life, police launch a desperate search for the killer.

Amina and Sarah's desire to live the life of a typical American teenager is stunted by their strict father. When they rebel, it leads to an explosive and tragic end.

22-year-old mum, Shawn Williams, goes to the store one night and never returns. Her body is found the next day along an Oklahoma river. Is the killer a man in her life?

When the torso of Mary Stetson washes up along the Piscataquog River, police retrace her final steps. But every place along Mary's path presents new mysteries.

In 1995, a female singer on the brink of superstardom is murdered in a motel in Texas. Fans clamour for justice as police negotiators stand-off with an unlikely killer. PREMIERE

Meredith Emerson starts the new year by hiking on Georgia's Blood Mountain with her dog. When she vanishes and her dog is found 60 miles away a frantic search begins.

When housewife Dorothy disappears, many suspect that she is seeking to start afresh. When her daughter searches for her, she unlocks a surprising secret.

In 2010, Greg Fleniken was found murdered in a Texas hotel. The case runs cold until a Long Island PI uncovers a chilling conspiracy that no one saw coming.

Experts delve into disturbing cases of psychopathic killers known as "family annihilators," who see family members as simply potential victims.

In 2003, a bank heist escalates into a robbery-homicide. Despite having his picture and DNA, police struggle to find the killer, until they learn he hides in plain sight.