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In Caulfield, Missouri, a local businesswoman is found stabbed to death at home. Police arrested two people in connection of this brutal murder.

After a long battle with cancer, David Weedman is found dead in his home with a gunshot wound. Investigators soon turn their focus to David's best friends.

In Orinda, California, the 'Bobbies' function like a high school sorority. When someone murders one of their own, every Bobbie becomes a suspect.

A West Philadelphia neighbourhood is left reeling when a high school track star destined for Olympic glory disappears without a trace.

On Valentine's Day 2013, Oscar Pistorius shot dead his girlfriend, Reeva Steenkamp. He said it was an accident, but does audio and TV footage suggest he was faking.

Andreen has always had her sights set on success. But the more successful Andreen gets, the more threatened her husband Andre becomes.

The story of the Amityville horror house rocked the world. Real footage and never-before-seen interviews reveal frightening new secrets about this haunt.

When a husband discovers his wife and two children brutally murdered, police quickly suspect the killer is someone they've arrested before.

In Dunlap, Tennessee, a body is found on the banks of the river. Detectives piece together the unknown man's final moments to find the culprit.

A farmhand in Montana discovers her co-worker's body. In a town with only 110 residents, police desperately search for the killer in case they strike again.

In Orinda, California, the 'Bobbies' function like a high school sorority. When someone murders one of their own, every Bobbie becomes a suspect.

A West Philadelphia neighbourhood is left reeling when a high school track star destined for Olympic glory disappears without a trace.

In Dunlap, Tennessee, a body is found on the banks of the river. Detectives piece together the unknown man's final moments to find the culprit.

A farmhand in Montana discovers her co-worker's body. In a town with only 110 residents, police desperately search for the killer in case they strike again.

In Caulfield, Missouri, a local businesswoman is found stabbed to death at home. Police arrested two people in connection of this brutal murder.

After a long battle with cancer, David Weedman is found dead in his home with a gunshot wound. Investigators soon turn their focus to David's best friends.

In Orinda, California, the 'Bobbies' function like a high school sorority. When someone murders one of their own, every Bobbie becomes a suspect.

When Lanny Horwitz is found murdered in his own home, it unleashes a shocking tale of jealousy and infidelity, leaving every member of the family a suspect.

When Terry Thrift vanishes, no one has answers. The mystery of his disappearance - and the salacious betrayal behind it - isn't solved for 20 years.

A shotgun wedding leads naval officers John and Rebecca in a troubled marriage. Years later, a fierce custody battle pushes both sides in a deadly battle.

Sparks fly when Donald meets a beautiful Mississippi blonde. They soon get married and have a happy family - but beneath this blissful union lurks deceit and danger.

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.

In 2006, Angela Ferguson tells police her husband left during an argument and hasn't been seen since. When his body is found in a car boot, it becomes a murder case.

In 2000, Casey and her boyfriend T.J. disappeared, never to be seen alive again. Detectives turn to the friends they were with the night they vanished for answers.

Police catch a break on three cold case murders when DNA technology makes a match. They interrogate a 73-year-old man who's been in prison since 1993.

Police find an elderly couple murdered in their Georgia home. They discover the evil crime was a fantasy killing done by two teen psychopathic lovers.

A young man knew his father was a monster and a killer, but to this day, he doesn't know the scope of his father's horrendous crimes.

Renee fears her little brother's cruel taunts until she fights back. But she never suspects he would plot revenge on his family.

Desiray finds herself trapped in a living hell and must fight like hell to survive after she tries to leave her violent, controlling partner.

A wealthy family in Texas is deeply rooted in the pecan farming business. But when some relatives want to start doing business differently, the claws come out.

A shotgun wedding leads naval officers John and Rebecca in a troubled marriage. Years later, a fierce custody battle pushes both sides in a deadly battle.

Sparks fly when Donald meets a beautiful Mississippi blonde. They soon get married and have a happy family - but beneath this blissful union lurks deceit and danger.

In 2006, Angela Ferguson tells police her husband left during an argument and hasn't been seen since. When his body is found in a car boot, it becomes a murder case.

In 2000, Casey and her boyfriend T.J. disappeared, never to be seen alive again. Detectives turn to the friends they were with the night they vanished for answers.

A shotgun wedding leads naval officers John and Rebecca in a troubled marriage. Years later, a fierce custody battle pushes both sides in a deadly battle.

Sparks fly when Donald meets a beautiful Mississippi blonde. They soon get married and have a happy family - but beneath this blissful union lurks deceit and danger.

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.

In 2006, Angela Ferguson tells police her husband left during an argument and hasn't been seen since. When his body is found in a car boot, it becomes a murder case.

When a father-of-two suddenly vanishes, his friends hint that he led a secret life. But it remains a mystery for years - until a tip reveals the jaw-dropping truth.

A video blogger posts every detail of her life online. One night, intruders break in her home and kill her husband. Will her endless videos provide a clue as to why.

A skeleton is discovered on the edge of a high school football field. It takes a forensic sculptor and tireless detective work to finally bring the killer to justice.

A police officer is shot dead in a suspected set-up. Detectives take drastic measures to get answers from a tight-lipped local community.

In 2005, a pregnant mother goes missing in Philadelphia. Detectives stumble on a love-triangle that may explain the secrets behind her death.

When teenager Harmahn Smith misses his curfew, his parents seek the police's help. His car and body are discovered - what happened to the 18-year-old.

As quarterback and then as coach, Juan Joseph led his Louisiana high school football team to multiple victories. The community is shocked when he is murdered.

Local football hero TK Kelly carried the dreams of his small California city on his shoulders, but for someone close to TK, jealousy was motivation enough to kill.

It sounds like a routine call to the police, but it's a deadly trap. The caller is a killer who vowed vengeance on the police.

Alina Burroughs travels to Missouri to dig into the murder of Richard Armitage, an attorney attacked at his desk. Could blood spatter be the key to the case.