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In Oklahoma, police use high-tech tools to catch a trio of killers. In Dubuque, Iowa, investigators use RTCC surveillance video to track down a woman's killer.

When a pregnant mother and her two children are murdered her husband, and their father, admits to the shocking crime.

When a toddler's body is found, police immediately suspect the family. But, when the dad claims the mum is missing they quickly learn something very tragic happened.

When a gentle, elderly man is found dead at his home, even hardened Philadelphia detectives are shocked. Who could have killed the 78-year-old man, and why.

24-year-old Gregg Smart is found brutally murdered in the entrance to his condo. Investigators soon arrest three local teens with connections to his wife.

Police discover that Pam Smart was having an affair with her husband's 15-year-old killer. She is soon arrested for masterminding the murder.

As the trial continues, the prosecution plays secret audio recordings that shock the courtroom. But Pam insists she wasn't involved in her husband's death.

Intruders break in and hold Valerie Yussman hostage. They demand her son Matthew rob the credit union where he works and attach a bomb to him to ensure he complies.

Intruders break in and hold Valerie Yussman hostage. They demand her son Matthew rob the credit union where he works and attach a bomb to him to ensure he complies.

Proof. When a mother is killed in a tragic trucking accident, her family begin to question whether it was actually premeditated murder. Now, they fear for her son.

Two women who work for a tax attorney know he is prone to hysterical outbursts. But, when he turns violent it reveals some terrifying secrets.

32-year-old Michele Whitaker leads a troubled life when she mysteriously vanishes. Her family and police investigate for six years, until a phone call gives answers.

When Dena Raley-McCluskey disappears, investigators focus on her ex-boyfriend with whom she had a stormy relationship. An unexpected lead reveals the shocking truth.

When mother-to-be Jenny Webb doesn't come home her loved ones are worried. Later that night, their fears are confirmed when she's found dead.

When a hardworking trucker is shot dead in his truck, detectives are left with few clues to find his killer. Two years later, a confession cracks the case.

Successful business owner MaryAnn Clibbery is brutally murdered in Illinois. A suspicious bag floating on the ice in the river unlocks the secrets of her slaying.

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.

Sharon Nelson wanted it all: love, sex and money. When she sets her sights on a handsome and married doctor, she carves a devastating path filled with dead bodies.

Nancy was always curious about her mother's rich friend, Marjorie. But when she fully enters her life, she becomes entwined in a series of bizarre crimes.

David attends one final meeting before driving home to visit family. But soon after, his truck is found abandoned. How did David just vanish into thin air.

Former Harlem Globetrotter Rico Harris is driving to Seattle and mysteriously vanishes. Investigators embark on a journey that grows more baffling as time passes.

In 1994, a murder rocks a family's Christmas celebration. A mum prepares a holiday dinner for a son who never arrives, and a detective unearths a pastor's dark secret.

A shooting in a luxury building sends shockwaves through an upscale neighbourhood. Detectives uncover a list of suspects and a plot born out of economic envy.