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The tragic murder of a 14-year-old girl in Michigan leaves behind little physical evidence, forcing investigators to enter the digital world in search of clues.

When 26-year-old Erica Crippen Crosby disappears from her home in New Jersey, detectives must follow a digital trail to uncover the truth about what happened to her.

When a co-worker finds 67-year-old Karen Navarra dead in a bloody scene at her California home, the seemingly contradictory physical evidence baffles police.

When 21-year-old Julie Ann Gonzalez suddenly goes missing, detectives investigate her puzzling digital trail to uncover the horrifying truth behind her disappearance.

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

Shana Grice was murdered after being stalked by her ex-boyfriend, Michael Lane. He denied involvement, but experts examine police videos to determine the truth.

When 16-year-old Becky Watts vanished without trace suspicions fell on her step-brother and his partner. Experts analyse police interviews for clues.

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.

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 Mother, A Murder & A Manhunt. A bitter custody battle ends in tragedy when a toddler is found dead. A three-year manhunt ensues to track down her killer - her own mother.

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.

Marioara Shand is setting out on her own in New Mexico after a recent breakup. One day in July of 2002, police discover her body in a bloody scene inside her new home.

When high school choir kids Keri Murphy and Rebecca Keller team up, their passions collide. The only way to get what they want is for someone to die.

In Warren, Michigan, two of the best and brightest, Danyna Gibson and Tanaya Lewis, compete for more than just grades and the results turn deadly.

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.

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.

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

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.

Michelle disappears, and soon after her abandoned car is found. But has she been abducted, or is she on the run from the law.

Brian Barton is in a successful punk rock band but suddenly quits, breaks up with his fiancée, and disappears. Did he walk away, kill himself or was he murdered.

Gone on the 4th of July. After a violent argument with her boyfriend, Roxanne vanishes. What was she doing in an area infamous for drugs and prostitution and where is she now.

Big-hearted Patti clocks out at the end of her shift at the factory and is never seen again. What happened to this popular mum and is a mystery man involved.

In Alabama, Brucetravius Frazier is found dead in his car. When an attempt is made on the life of a witness, police realise they are not dealing with an average killer.

In Ohio, local antiques dealer Mary Kay Wohlfarth mysteriously vanishes. However, finding Mary Kay leads to more questions than answers for investigators.

A TV personality has a violent encounter with another motorist. A dramatic car chase has a fiery end, and weapons are used in angry road encounters.

An axe-wielding man taunts a motorist. Protesters disrupt a highway, infuriating motorists, and two raging drivers have a roadside showdown.

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

When cowboy Rick Godfrey goes missing in the Mojave Desert, investigators discover he's seduced and swindled many women. Has someone taken revenge.

A prairie town sheriff uncovers a drug ring that includes law enforcement officials. Before the trial, the ring's kingpin does a deal - days later, he's dead.

In 2015, the small town of Bremerton, Washington State, is rocked by the brutal murder of a popular young woman, attacked in her own home.

Michelle disappears, and soon after her abandoned car is found. But has she been abducted, or is she on the run from the law.

Brian Barton is in a successful punk rock band but suddenly quits, breaks up with his fiancée, and disappears. Did he walk away, kill himself or was he murdered.

In Alabama, Brucetravius Frazier is found dead in his car. When an attempt is made on the life of a witness, police realise they are not dealing with an average killer.

In Ohio, local antiques dealer Mary Kay Wohlfarth mysteriously vanishes. However, finding Mary Kay leads to more questions than answers for investigators.

Michelle disappears, and soon after her abandoned car is found. But has she been abducted, or is she on the run from the law.

Brian Barton is in a successful punk rock band but suddenly quits, breaks up with his fiancée, and disappears. Did he walk away, kill himself or was he murdered.

Gone on the 4th of July. After a violent argument with her boyfriend, Roxanne vanishes. What was she doing in an area infamous for drugs and prostitution and where is she now.

Big-hearted Patti clocks out at the end of her shift at the factory and is never seen again. What happened to this popular mum and is a mystery man involved.

In Alabama, Brucetravius Frazier is found dead in his car. When an attempt is made on the life of a witness, police realise they are not dealing with an average killer.

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.

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.

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.

Dr. Larry Nassar's popularity surges after helping the USA women's gymnastics team win gold. Years later, the true cost of his methods emerges.

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