Crime

Whatcom County jury reaches verdict in trial of man accused of killing his brother

John Thomson, who was charged with first-degree murder, testifies during his April 2025 trial in Whatcom County Superior Court.
John Thomson, who was charged with first-degree murder, testifies during his April 2025 trial in Whatcom County Superior Court. The Bellingham Herald

A jury found a Seattle man accused of shooting and killing his brother during a trip back from Republic in 2022 guilty of second-degree murder on Monday following two days of deliberation. He faces life in prison without parole.

John Roper Thomson, 42, killed his half-brother, 69-year-old Robert Thomson, near the western end of Diablo Lake in the North Cascades National Park on Aug. 8, 2022. He was charged with first-degree murder and two counts of unlawful possession of a firearm.

To be found guilty of second-degree murder, all jurors must find that the person killed someone intentionally, but without premeditation. Jurors either all decided John Thomson was not guilty of first-degree murder, or could not come to a unanimous decision.

John Thomson was also found guilty of two counts of unlawful possession of a firearm. He was not allowed to own guns due to a prior felony conviction. Each of these charges carries a maximum sentence of five years in prison.

John Thomson’s trial lasted two weeks in Whatcom County Superior Court. His sentencing has been scheduled for June 5.

Hannah Edelman
The Bellingham Herald
Hannah Edelman joined The Bellingham Herald in January 2025 as courts and investigations reporter. Edelman resides in Burlington. Support my work with a digital subscription
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