Police believe son killed family members before shooting himself, multiple sources confirm
KING5.com••nation
Key Points:
- Williams, an unemployed computer professional, sent an email hours before four family members were found dead, warning friends that retrieving his guns might expose them to traumatic scenes.
- On Dec. 30, 2025, police discovered the bodies of Danielle Cuvillier and her son Williams on Mercer Island, both victims of gunshot wounds, with the incident believed to be a homicide-suicide.
- Danielle Cuvillier had filed a protection order against Williams a year earlier, citing concerns about his mental health, behavior, and access to firearms; Williams subsequently surrendered 53 guns to police.
- Court records reveal a history of family conflict, including a 2025 assault charge against Danielle following a confrontation with Williams, and prior
