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The Barnetts' adoption of an allegedly six-year-old Ukrainian orphan turns into a nightmare when they learn she may not be six, or Ukrainian.

Orphan Or Imposter? Michael Barnett claims Natalia tried to poison them. But inconsistencies in his story leads investigators to question who the real villain is.

A girl discovers her mother's true identity after she's murdered. Will the investigation bring her closer to the woman she never knew.

Police must solve the murder of a young mother who was savagely strangled to death in her bed while her two young sons slept just steps away.

Vegas showgirl Debbie Flores Narvaez isn't afraid to ruffle feathers. When Debbie goes missing, investigators wonder if a jealous rival is responsible.

Dalhart, Texas, 2017. Joel Frazier is the proud father of two former rodeo queens, Camie and Jamie Frazier until suddenly he goes missing.

A figure dressed as a clown shoots a mother on her doorstep. The case goes cold until an unexpected break helps bring the killer clown to justice.

Maria's world shatters when her husband Joel, starts an affair. When Maria threatens divorce, Joel makes a deadly plan to stop her.

When Heidi's alcoholic husband, Chris, goes missing, police uncover a dark secret hidden in the basement of the marital home.

A brutal murder occurs, and police turn their attention to several family members who don't see eye to eye. They discover a shocking truth that nobody suspected.

When an entrepreneur is gunned down, police suspect a hit. After a long night of partying, two friends' overdoses may be something more sinister.

Dorian Bluford's family were anxious when he told them he was moving to live with a friend they did not know. Later, he is found brutally murdered.

The dismembered body of a missing woman turns up in trash bags. A detective's pursuit of the suspect prompts the question: Could this man be a serial killer.

Who Wanted Him Dead? A US soldier meets harm in Upstate New York, and his killers may have been his fellow GIs. A missing man's haunting voicemail is his final clue.

When April Barber was murdered at a remote beauty spot, her husband said he tried to stop the killer and even appealed for help on TV. Experts analyse his deception.

When Laci Peterson went missing, her husband claimed he last saw her before he went fishing - but his secret mistress exposed his lies. Experts examine his behaviour.

The abduction and murder of a young schoolteacher shocks a New England town. Veteran investigator Robert Cushing is appalled by the depravity of the killer's plan.

On Chincoteague Island, a young mother is murdered steps from a vacant summer home. Det. Danny Plott learns she was lured to her death by a mysterious phone call.

Divorced mum Krystal is delighted when she marries single dad Nathan. Little does she know, her blended family will soon turn into a nightmare.

In the remote hills of North Carolina, Ulayla Rose talks about her brother John Hardy Rose's bizarre predilections and how a murder rocked their tiny town.

In 2015 Texas, aspiring rapper Daeveion Mangum seeks fame through risky choices, but one decision drags him into a deadly spiral of violence.

NYPD follows a bloody trail of murder attempts against a real estate entrepreneur with shady ties, but the mastermind is closer than they realised.

God Was Going To Use Me. A nurse confesses to helping end the lives of numerous elderly patients. But detectives soon discover she is no angel of mercy, but a ruthless psychopath.

A woman is brutally murdered in her home. When the police interrogate the prime suspect, they quickly realise they've come face-to-face with a deranged psychopath.

When police arrive on the scene of a brutal murder, the culprit appears calm as he stands next to his girlfriend's body and reveals there are more victims.

Boom. Boom. Police find a father of two dead in his home with over 15 gunshot wounds. They question the family, but one person is missing, his mother-in-law.

Marie is left to fend for herself after a mysterious illness overtakes her husband. Tension mounts as another bout of the illness threatens to kill.

Is everything really a little sweeter in the South? For Jim and Kelley one of Tennessee's finest young couples, a fairy-tale isn't quite as enchanted as it seems.

Christmas is ruined when hikers in New Mexico stumble across Roxanne Houston's shallow grave. Police rule her death a homicide but struggle to find a suspect.

When Alyce Seff's body is found in a wishing well, detectives are shocked to find that the elderly landlady had as many enemies as she had friends.

When Andrea Farrington meets colleague Alex Kozak she thinks romance is possible. But suspicion and fear take over, leading to a rejection with fatal consequences.

24-year-old Caroline Nosel befriends new colleague Christopher O'Kroley, but he soon begins harassing her. After he is dismissed from work, he seeks revenge.

Kerri Harris and a colleague find a hidden camera in the ladies' room, and they make a complaint. But as police begin investigating, Kerri is found stabbed to death.

Robert Henry, an executive in Tacoma, is murdered in 1995 by a masked gunman. His wife tells police she thinks he was killed by a former business associate.

Christmas is ruined when hikers in New Mexico stumble across Roxanne Houston's shallow grave. Police rule her death a homicide but struggle to find a suspect.

To solve the murder of a respected young entrepreneur, Detective Dale Mason must navigate a tangled conspiracy and outwit a band of career criminals.

When a father of five is found dead on his kitchen floor, Det. James Colley must untangle a web of twisted relationships and bizarre fantasies to uncover the mystery.

When single dad David Heisler goes missing, clues lead detectives into the desert, but the trail stops cold. Digital forensics experts to help unravel this mystery.

When two young men are shot dead, detectives turn to digital forensics, hoping hidden data buried in the victims' cell phones will help track down the killer.

When 12-year-old Aynis Vargas dies in a seemingly random attack, investigators piece together clues from social media, cell phone data and surveillance footage.

When family man Ricky Saxton is found murdered, Investigators turn to a forensic data specialist at the FBI to help locate a missing piece of the puzzle.

After police find a young mother bound and murdered in her bedroom, her family challenges police to bring a heartless killer to justice.

Police must analyse a long emotional and rage-filled 911 call. Was it made by a distraught husband or a killer trying to cover his tracks.

In 2015 Texas, aspiring rapper Daeveion Mangum seeks fame through risky choices, but one decision drags him into a deadly spiral of violence.

In 2001, someone murders a father, sets his Florida home ablaze, and his sons disappear. Now, an exclusive interview uncovers the chilling truth.

In Texas, an intoxicated driver hits a train carrying explosive chemicals. And, a SWAT team tear down a house to arrest two murder suspects.