On Halloween night in 2004, the quiet town of Napa, California was shaken by something far darker than tricks or treats. Inside a small home on Dorset Street, two young women were brutally murdered. Their roommate, escaped into the night. What began as an ordinary evening turned into one of the most haunting crimes the town had ever seen.

At first, police were baffled. There were no signs of forced entry, no clear motive, and no sense of who could have committed such a personal and violent act. But as days passed and evidence surfaced, it became clear the killer wasn’t a stranger in the dark—he was someone much closer to home.

In this episode, we revisit the Napa Valley Halloween Murders, exploring the fear, betrayal, and chilling discovery that turned a night of celebration into a nightmare.

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Sources:

Young, Nikki Oct 17, 2025 The Napa Halloween Murders

https://medium.com/@nikyoung/the-napa-halloween-murders-90f0d6521f0c

Unseen It only took 4 minutes: The Napa Valley Halloween Massacre | The Cases of Leslie, Adriane & Lauren

https://youtu.be/QAEosSmAmYI?si=_jlX-Dq6l81xt1gH

National Crime Scene Cleanup Sept. 19, 2023 The Napa, CA Halloween Killing Remembered 20 Years Later

https://www.crimescenecleanup.com/napa-ca-halloween-massacre/

LaRosa, Paul 2007 "Nightmare in NAPA : the wine country murders"

https://catdir.loc.gov/catdir/enhancements/fy0730/2007296752-s.html

https://www.findagrave.com/memorial/36743450/adriane_michelle-insogna

https://www.findagrave.com/memorial/129901915/leslie_ann-mazzara