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Harmony Danner

Case from Mercer Island, WA dated Dec 30, 2025

Victim Details

Harmony Danner

Female

White / Caucasian

Mercer Island

WA

2025-12-30

44

Harmony

Danner

07/05/2026

Case Description

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On December 30, 2025, Harmony Danner, a 44-year-old woman and physical therapist from Mercer Island, Washington, was found dead in her Issaquah home. She, along with her brother-in-law, Dominick "Nick" Cuvillier, 34, were victims of a tragic double murder-homicide that spanned two cities and claimed the lives of four family members. The King County Medical Examiner's Office later confirmed that Danner died from multiple gunshot wounds.

The investigation into Danner's death began after her ...
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Links to Additional Sources (10)

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  • king5.com: 'Kind and gentle': Candlelight vigil honors Issaquah woman killed in family murder-suicide
  • KOMO: Dispute over care of special needs man linked to four deaths in Mercer Island, Issaquah
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    Forum Posts (2)

    I’ve been following the Harmony Danner and family tragedy in Washington, and I can’t stop thinki... ...Read More
    01/31/2026
    Did anyone else notice how much effort Mackenzie Williams put into maintaining his gun collection? I... ...Read More
    01/22/2026
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