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Police suspect a murder-for-hire plot when a realtor is attacked and left for dead at a home showing and begin investigating his family and business partners.

Police suspect a murder-for-hire plot when a realtor is attacked and left for dead at a home showing and begin investigating his family and business partners.

The brutal murder of Michelle Young, who was pregnant with her second child when she was killed while her husband was away on business.

An aspiring Playboy model is brutally murdered in Miami after visiting a nightclub with her boyfriend.

Authorities open a cold case of the disappearance of Carol Lubahn.

Four years after a 28-year-old dies after hosting a New Year's Eve party, a jury must decide if it was suicide or murder.

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.

Motivational speaker Rebecca Musser talks about her life in The Fundamentalist Church of Jesus Christ of Latter-day Saints and what made her leave the denomination.

A mother of two mysteriously vanishes from her parents' Michigan home while going to check the mailbox, leaving her phone and identification behind police declare her dead without discovering a body.

Motivational speaker Rebecca Musser talks about her life in The Fundamentalist Church of Jesus Christ of Latter-day Saints and what made her leave the denomination.

A mother of two mysteriously vanishes from her parents' Michigan home while going to check the mailbox, leaving her phone and identification behind police declare her dead without discovering a body.

A son uncovers a dark family conspiracy when he questions his mother following a man's apparent suicide.

An aspiring Playboy model is brutally murdered in Miami after visiting a nightclub with her boyfriend.

Authorities open a cold case of the disappearance of Carol Lubahn.

Friends of accused murderer Robert Durst talk about his recent arrest in New Orleans and his whereabouts over the past 30 years.

Police link a filmmaker who is obsessed with the show "Dexter" with a man's disappearance.

Detectives take another look at a 20-year-old murder and discover the evidence points to one of their own.

A beauty queen's murder.

Friends of accused murderer Robert Durst talk about his recent arrest in New Orleans and his whereabouts over the past 30 years.

A woman's DNA test sends her father halfway around the world to confront his past.

New insights into the real story of the very private royal, including a look at Diana's troubled marriage, her turbulent life in the royal family and the investigation into her death.