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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.

With a new home and loving fiancé, single mum Lisa Filiaggi can't believe her luck - until past troubles return to haunt her and threaten to destroy her future.

When a recently widowed businesswoman is found brutally murdered in her Little Rock home, police discover the killer is closer to her than they thought.

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.

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'.

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.

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.

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.

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.

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.

Recently divorced Brian Cargill thinks he's met the woman of his dreams. However, Kimberly Cargill is a master manipulator, and her violent nature leads to murder.

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.

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.

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.

When a woman is found murdered in her home in 1988, police examine strife and infidelity in her marriage. A surprise witness leads to the killer.

When a widower and father is found dead outside his home, police suspect it's linked to shady business deals. A tip exposes dark family secrets.

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.

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.

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.

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.

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.

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.

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.

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.

Who Shot Darrent Williams? On New Year's Eve, NFL player and former Texas high school football star Darrent Williams is at a party. Soon after midnight, he's shot dead.

Sixteen-year-old Mujey Dumbuya turns up dead four days after leaving to go to school. Police are stumped until jailhouse calls provide clues.

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