The Worst Episodes of On the Case with Paula Zahn

College student Mark Fisher went out in Manhattan with friends one night and ended up shot to death outside a house party in Bensonhurst, Brooklyn. The puzzle of what happened to Fisher left investigators at a loss when fellow partiers put up a wall of silence.

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We enter the mind of a cruel and sadistic predator whose acts of wanton violence - and subsequent arrest - are the beginning of a twisted tale of one man's madness and one woman's quest for the truth.

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When a young teacher is murdered in her home, police must rely on the eyewitness testimony of a young neighbor who saw her killer lurking outside her window.

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When a young woman's car is found abandoned on a bridge, police must consider three possibilities. Had she run away, committed suicide, or been the victim of foul play?

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An unlikely pair of investigators strive to solve Elaine Fogle's murder after the case goes cold for four decades.

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When a couple enters their home during a robbery in progress, a deadly shoot out erupts, leaving two people dead. But when police begin an investigation they discover clues that it may not have been what it appears to be.

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When a young mother disappears police painstakingly retrace her last known movements. The trail of clues they uncover leads to a shocking and heartbreaking discovery.

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The gruesome murder of horse ranch owner Wendi Brant traumatises her friends and family; Police focus on her estranged husband, but there are other potential suspects that muddy the investigation and throw the case into a decades-long tailspin.

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Police must solve the murder of a young mother who was savagely strangled to death in her bed while her two young sons slept just steps away; decades of investigating reveal an unthinkable betrayal of trust.

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After police find a young mother bound and murdered in her bedroom, her family challenges police to bring a heartless killer to justice.

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Police try to make sense of the confusing crime scene and find the person who killed a young mother.

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Police must analyze a long emotional and rage-filled 911 call to see if it was made by a distraught husband or a killer trying to cover his tracks.

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A woman finds a young mother murdered following a festive New Year's celebration; police trace her last known steps to find her killer.

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The police must identify the killer of a young mother based only on her frantic words in a disconnected 911 call.

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The investigation of a brutal murder forces police to challenge both confessions and lies.

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A young girl vanishes on a trip to the mailbox and her abandoned pink bicycle may be the key to solving the disturbing mystery.

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Police must track down the vicious killer of two separate Jane Doe victims, murdered in a shockingly similar way.

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The abduction of a young girl sends a detective on a quest to bring justice to her heartbroken family.

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A young mother is murdered inside her home, and her family hopes to help put her killer behind bars.

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A daughter receives an odd text from her mother's phone claiming she left town with a new man, which is the first clue that something is very wrong. The ensuing investigation uncovers more troubling evidence proving her worst fears have come true...

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Police must connect the crime scene evidence from two eerily similar murders to put one vicious killer where he belongs: behind bars

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Police struggle to dissect the love triangle that led to the disappearance of 21-year-old married college student and mother Bethany Decker in Ashburn, VA; her jilted husband, Emile, and her jealous new boyfriend, Ronald Roldan, are prime suspects.

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Can police solve the murder of a young woman killed while celebrating her graduation from U.S. Naval training?

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In 2014, police discover that Tiffany Pugh, the successful wife of a popular DJ, has been murdered in her home in East Point, GA; the array of video cameras in the neighborhood could help bring her killer to justice.

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Police use a revolutionary new technique to sort through a long list of guests and employees at the Paradise Ranch to find the one person responsible for a savage murder...

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