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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.

A man turns out to be a bloodthirsty monster attacking young women at will. It takes decades for the survivors to discover he is a serial killer.

The Strange Disappearance Of Karlie Guse. In 2018, a young girl vanishes after attending a high school party in an isolated town in Northern California. What happened to Karlie Guse.

John hunts Hugo Ramirez-Lopez, a fugitive suspected of murder and sexual assault. And, Cal pursues a man who has been on the run since 2010.

John hunts for a man accused of murdering his girlfriend and abducting their young son. Later, John and Cal seek a young woman who was abducted in 2017.

Christopher Donnelly was found battered with 78 visible injuries in Aylesbury, Buckinghamshire. His wife, Hannegret, had been abusing him at home for years.

A classic love triangle that lasted 16 years led to a shocking murder by Lakhvir Singh in 2009. Her method of killing gave her the nickname 'The Curry Killer'.

When popular college student Martin Roberts goes missing, only a cryptic note is left behind. Two years on, his family want to solve the mystery once and for all.

When veteran Michael VanZandt vanishes, police suspect it's a random attacker. But his family are haunted by his thrill-seeking when considering his fate.

A classic love triangle that lasted 16 years led to a shocking murder by Lakhvir Singh in 2009. Her method of killing gave her the nickname 'The Curry Killer'.

Emergency workers find the body of Megan Sharpton at the centre of a brush fire and police race to track down the attacker before he claims another victim.

The brutal murder of Mike Greene, a retired police officer, and wife Terri shatters their small Michigan town. Was it a personal grudge, or a less obvious motive.

One evening in 2010, 40-year-old Rachael Anderson called a friend regarding a home improvement project. Then, she vanished and eight years later is still missing.

College student Jessica O'Grady vanishes late one night. When another woman disappears without a trace, locals wonder if a serial killer is on the loose.

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.

Friends call cops to help them find Toni, who vanished after mixing alcohol with her bi-polar meds on a night out. But is their search about to take a dark turn.

Yale University researcher Annie Le is due to get married, but vanishes on her way to her lab, prompting a nationwide search. Chris Hansen reveals the truth.

Josh Bailey has carved out a decent life for himself, despite his disabilities. But after he disappears, his parents fear he's fallen in with the wrong crowd.

A newly engaged woman is discovered dead on New Year's Day. Investigators brush her death off as suicide, but her family are convinced foul play is involved.

When two young adults are found dead weeks apart police are stumped. Disturbing text messages and contradictory statements suggest they were murdered.

In Pennsylvania, the body of a computer programmer is found submerged in a bathtub. Leads are scarce until detectives uncover a series of troubling voicemails.

A former mayor of an Ohio town turns up dead in his hunting cabin. Detective Ryan Allar explores whether this is political retaliation or something more personal.

When Tara Lynn Grant, a 34-year-old mother goes missing, police can find no trace of her until a gruesome discovery turns the case into a state-wide manhunt.

In 1992, when Jenn Drury learns about her father's brutal, cold-blooded murder, her first thought is that the cult has something to do with it.

Three members of a tightknit community are gunned down and the locals want answers. However, it may turn out that the killer has been living among them.

In 1990, student Walter Ackerson goes missing. In 2004, detective Mark Meister takes on the seemingly impossible task of finding him and unravelling the mystery.

In 1981, a teenager hunts his missing little sister. When a mother seeks her young son who vanishes playing near the river in 1995, is history repeating itself.

A newly engaged woman is discovered dead on New Year's Day. Investigators brush her death off as suicide, but her family are convinced foul play is involved.

When two young adults are found dead weeks apart police are stumped. Disturbing text messages and contradictory statements suggest they were murdered.

In Pennsylvania, the body of a computer programmer is found submerged in a bathtub. Leads are scarce until detectives uncover a series of troubling voicemails.

A former mayor of an Ohio town turns up dead in his hunting cabin. Detective Ryan Allar explores whether this is political retaliation or something more personal.

When two young adults are found dead weeks apart police are stumped. Disturbing text messages and contradictory statements suggest they were murdered.

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.

Friends call cops to help them find Toni, who vanished after mixing alcohol with her bi-polar meds on a night out. But is their search about to take a dark turn.

Yale University researcher Annie Le is due to get married, but vanishes on her way to her lab, prompting a nationwide search. Chris Hansen reveals the truth.

Josh Bailey has carved out a decent life for himself, despite his disabilities. But after he disappears, his parents fear he's fallen in with the wrong crowd.

A tiny town in Maine with a population of 80 residents is torn apart when a couple are shot dead in their own home. Who murdered the high school sweethearts.

Brittney Cosby and her girlfriend Crystal Jackson are looking forward to spending their future together. When they are brutally murdered, everyone is a suspect.

Deception. When Jean Claude Dominique is victim to a hit-and-run, his wife rushes to his side - only to meet his other wife. This glimpse into his double life leads to danger.

When Ignacio Garraus meets Shawna Nelson, there's instant heat despite their marriage to other people. When he tries to end the affair, things take a dark turn.

A retired couple leave home to sail to Thailand. Just as their dream becomes reality, utter evil strikes and a night of paradise turns into an unfathomable nightmare.

Kelley and her husband love each other but disagree about their love of water. One day, she decides to surprise him on the boat, only for her and the crew to never return.

In Osakis, Minnesota, a baseball-loving wife and mother is found unconscious at home. Investigators turn to family, friends and locals to piece together what happened.

In Montrose, Colorado, a woman's body was discovered in the quarry that she owned. After three years, police were still investigating the brutal murder.

An angry motorist tries to ram his way out of trouble as officers corner him in a tight space, and an arrest turns nasty as a suspect decides to fight officers.

A fisherman spots a dismembered corpse floating in Thunder Bay. The case stalls until a fearless young witness delivers a harrowing testimony.

On Halloween, Doreen Erbert answers the door to a trick-or-treater only to face a masked murderer. With no clear description of the killer, everyone is a suspect.

In 1986, seven-year-old Michelle Norris is kidnapped and murdered in the nearby woods. Police are unsure who's responsible until a suspicious letter reveals a tip.

A retired couple leave home to sail to Thailand. Just as their dream becomes reality, utter evil strikes and a night of paradise turns into an unfathomable nightmare.

Kelley and her husband love each other but disagree about their love of water. One day, she decides to surprise him on the boat, only for her and the crew to never return.

In Osakis, Minnesota, a baseball-loving wife and mother is found unconscious at home. Investigators turn to family, friends and locals to piece together what happened.

In Montrose, Colorado, a woman's body was discovered in the quarry that she owned. After three years, police were still investigating the brutal murder.

Kelley and her husband love each other but disagree about their love of water. One day, she decides to surprise him on the boat, only for her and the crew to never return.

A tiny town in Maine with a population of 80 residents is torn apart when a couple are shot dead in their own home. Who murdered the high school sweethearts.

Brittney Cosby and her girlfriend Crystal Jackson are looking forward to spending their future together. When they are brutally murdered, everyone is a suspect.

Deception. When Jean Claude Dominique is victim to a hit-and-run, his wife rushes to his side - only to meet his other wife. This glimpse into his double life leads to danger.

When Ignacio Garraus meets Shawna Nelson, there's instant heat despite their marriage to other people. When he tries to end the affair, things take a dark turn.

A man calls 911, gasping that he accidentally shot himself. When the police hear a second it is clear that this shooting is no accident.

A woman returns home to find her husband unconscious and bleeding in their barn. Finding clues in the 911 phone call police uncover a deadly plot.

In 1994, a 55-year-old businessman is found shot in his kitchen. The police suspect his disabled son, but would he have had the capability to carry out a murder.

In 1985, Detective McLean responds to a report that a young mother has been shot dead. Her step-daughter confesses to the killing, but is she telling the truth.

Sandra never expected such extreme reprisals from her former partner, Norman. Her plan for a Thanksgiving reunion with her daughter ends with one person dead.

After her divorce, Cristi buys a new home that needs work. She hopes handyman Curtis can fix it up - but he becomes dangerously fixated with her.

Emergency workers find the body of Megan Sharpton at the centre of a brush fire and police race to track down the attacker before he claims another victim.

The brutal murder of Mike Greene, a retired police officer, and wife Terri shatters their small Michigan town. Was it a personal grudge, or a less obvious motive.

Texas police investigate the shooting of 23-year-old Jose Armando Pina. A masked perpetrator flees the crime scene and leaves behind vital evidence.

Princess. When a Homecoming Queen and a Dairy Princess are murdered in Marathon County, Wisconsin, detectives question a pool of suspects, from strangers to frenemies.

An adopted teenager has always felt out of place at home. She seeks acceptance online and meets Shawn. Soon, the family is drawn into a tragic series of events.

A predator lies in wait, stalking young women and striking when they are alone at night. But, one of the victims turns out to be the killer's own worst enemy.

Two young mothers living miles apart vanish under eerily similar circumstances. Years pass with no leads before a police officer uncovers the most unlikely suspect.

Sandra never expected such extreme reprisals from her former partner, Norman. Her plan for a Thanksgiving reunion with her daughter ends with one person dead.

After her divorce, Cristi buys a new home that needs work. She hopes handyman Curtis can fix it up - but he becomes dangerously fixated with her.

Emergency workers find the body of Megan Sharpton at the centre of a brush fire and police race to track down the attacker before he claims another victim.

The brutal murder of Mike Greene, a retired police officer, and wife Terri shatters their small Michigan town. Was it a personal grudge, or a less obvious motive.

After her divorce, Cristi buys a new home that needs work. She hopes handyman Curtis can fix it up - but he becomes dangerously fixated with her.

A man calls 911, gasping that he accidentally shot himself. When the police hear a second it is clear that this shooting is no accident.

A woman returns home to find her husband unconscious and bleeding in their barn. Finding clues in the 911 phone call police uncover a deadly plot.

In 1994, a 55-year-old businessman is found shot in his kitchen. The police suspect his disabled son, but would he have had the capability to carry out a murder.

In 1985, Detective McLean responds to a report that a young mother has been shot dead. Her step-daughter confesses to the killing, but is she telling the truth.

Pam Jacobs reveals the dark truth about her father. Growing up, she never realised he was a fugitive suspected of the murders of various coin shop owners.

I Have To Do The Right Things. When Tim Kreider discovered his son, Alec, committed a heinous crime, he knew he had to turn him in. But, how far will a father go to protect his son.

When Leesa Nascimento is killed by a shot in the head, a recently sacked co-worker, is traced after evidence is found that ties him to the murder.

A lunch break becomes a nightmare for two secretaries who vanish in broad daylight. One woman is found dead, launching a desperate search for her missing friend.

A woman's body is found in a tent bag in the Kentucky woods. 1000 miles away, a family seeks a missing mum. Both cases go unsolved for decades - until now.

The body of a teenage girl is found in a culvert by an Arizona freeway. Earlier, in Washington State, a teen is on a quest for love after a troubled childhood.

Christmas will never be the same for the Oklahoma residents whose dog drops a human skull onto their porch. Police must navigate the victim's past to find the truth.

Tray Phelps, a beloved father, son and fiancé is found beaten to death in his own driveway. When his killers are revealed, it shocks the small town.

When a body is discovered at the home of a white collar worker, a very private problem becomes a public trial. Was it a homicide or a suicide.

Iconic movie henchman, Joseph Son, turns out to be a real-life villain. When prosecutors face off with the actor on the stand, it's hard to tell fact from fiction.

When Sarah catches the eye of a flirty frat-boy she's happy to play along. But soon enough she discovers his dark secret. Can she break things off before it's too late.