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Secrets emerge and a family is torn apart when a cop's wife is shot to death in her bed.

Secrets emerge and a family is torn apart when a cop's wife is shot to death in her bed.

Key players in the case of Rod Covlin, a New York man who is found guilty of murdering his wife for her $5.3 million fortune and attempting to frame his then-teenage daughter, share their stories.

After a man is found murdered, detectives search for a motive in the seemingly senseless slaying; after considering whether it was a case of mistaken identity or a robbery, investigators ask if secret desires caused a killer to strike in God's name.

A newlywed bride disappears during a freezing Canadian winter leaving police with few clues; the search for her uncovers an unconventional marriage leading to multiple suspects.

Two young newlyweds move in with the groom's mom to build for their future, but when they mysteriously disappear, investigators embark on a cross-country manhunt for a cold-blooded con man and killer.

Eight days before the wedding of their dreams, a couple's plans are derailed by a brutal murder; a detailed investigation unravels a murder-for-hire plot that leads them to suspect a member of the wedding party.

Dennis Murphy reported on the twists and turns of the Jennifer Dulos case.

A college student is found murdered and the case sits cold for nearly 40 years; Josh Mankiewicz reflects on the vow that keeps the case alive and the innovative method used to catch the killer.

An aspiring Playboy model is murdered in Miami; a seven-second clip of her last moments alive are caught on security video and could hold key clues; the haunting images make this case one of Dennis Murphy's most memorable.

A man claims his wife died by suicide, but a suspicious house fire 24 years later raises doubts; Josh Mankiewicz remembers the suspect who could not stop talking.

When a pastor loses a second wife in an accident, authorities become suspicious; Dennis Murphy returns to this unforgettable story of evil and betrayal, wondering how far this man of God might have fallen.

Years after a Montana man is found dead, his son searches for answers; Keith Morrison cannot forget the son who opened a box and faced a terrifying family secret.

When an Iowa woman is attacked while home alone with her three children, the confrontation turns deadly; Dennis Murphy examines one of the most sophisticated criminal plots of his "Dateline" career.

When Josh Mankiewicz gets asked about his most memorable stories, the name Dayna Herroz comes to mind; after her daughter and 10-month-old grandson are murdered, her quest for justice ends with a twist in a San Diego courtroom.

A pregnant woman vanishes before her own baby shower and her worried family raises the alarm as detectives unravel a chilling mystery; for Josh Mankiewicz, it was a heartbreaking case that stayed with him long after the cameras stopped rolling.

After a nurse and mother-of-three is murdered inside her Illinois home, investigators uncover security camera footage that could be key to solving the case.

A bombshell more than a decade after the crime reignites the investigation into the death of Sarah Pagel's mother; Andrea Canning looks back at her emotional interview with Sarah, whose mom touched so many lives.