Mercer Island Police Investigate Deaths Following Welfare Check

Mercer Island, WA — December 30, 2025

At approximately 10:45 a.m. on December 30, 2025, Mercer Island Police Department (MIPD) officers were dispatched to a residence in the 8400 block of SE 46th Street to conduct a welfare check.

The request originated from an attorney representing the homeowner, who reported receiving a concerning email that raised fears for the occupants’ safety.

Upon arrival, officers looked through a window and observed an individual inside the residence who appeared to have suffered a gunshot wound. Officers made entry into the home and located two deceased individuals: a female in her late 70s and a male in his late 40s. Firearms were found within the residence and in proximity to the individuals.

Based on preliminary information, the incident appears to be a homicide followed by a suicide. There is no indication of an ongoing threat to the community. Investigators did identify concern for another individual who had previously resided at the location. As a precaution, MIPD requested the Issaquah Police Department conduct a welfare check at a separate residence in their city.

Detectives and members of the Washington State Patrol Crime Scene Response Team are actively investigating the circumstances surrounding the incident. This includes neighborhood canvassing and coordination with the King County Medical Examiner’s Office, which will determine the official cause and manner of death.

Further information will be released as it becomes available.

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For media inquiries, please contact:

Commander Jeff Magnan

Public Information Officer

Mercer Island Police Department

jeff.magnan@mercerisland.gov