King County is a county located in the U.S. state of Washington. The population was 2,269,675 in the 2020 census, making it the most populous county in Washington, and the 12th-most populous in the United States. From Wikipedia
Authorities identify Harshavardhana Kikkeri as the perpetrator in the deaths of his wife and teenage son at their Newcastle, Washington home, with the motive still under investigation.