Forensic Files

Nightmare in Napa | Full Episode

48 Hours

  • Oct 28, 2025
  • 41:04
  • Full Episode

A Halloween night double homicide in Napa Valley was a classic whodunnit -- until the victims' loved ones discovered that the killer was among them. Bill Lagattuta reports. Watch more full episodes of "48 Hours" on Pluto TV.

True crime. Real justice. "48 Hours" investigates the most intriguing crime and justice cases that touch on all areas of the human experience including greed and passion. "48 Hours," which premiered in 1988, has developed a rich history of original reporting and impact journalism that has helped exonerate wrongly convicted people, caused cold cases to be reopened and solved, and along the way changed lives.

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Brief Summary

The episode details the 2004 Napa Valley murders of Adrienne Allen and Leslie Mazara, revealing Eric Coppel as the killer.

Key points

  • The Napa Valley Murders. A double murder on Halloween night in Napa shocked the community.
  • A Night of Horror. Three roommates handed out candy and went to bed, unaware of the impending tragedy.
  • A Mother's Grief. Leslie's mother struggles to understand the rage that led to her daughter's murder.
  • The Investigation Begins. Police quickly realize the murders are not random and begin their investigation.
  • A Wedding Without Closure. Friends reflect on their wedding plans overshadowed by the unsolved murders.
  • Coppel's Arrest. Eric Matthew Coppel, husband of Adrienne's best friend, is arrested for the murders.

Tension

85/ 100High tension

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