The Brief

In July 2006, Mary Cooper and her daughter Susannah Stodden were shot and killed on the Pinnacle Lake Trail in Snohomish County, a case that remains unsolved nearly 20 years later.

David Stodden, husband and father to the victims, continues to grapple with the loss, while Detective Dave Bilyeu of the Snohomish County Sheriff’s Office investigates the case, believing the killings were random.

Stodden, cleared as a person of interest, recently revisited the trail with detectives, finding the experience therapeutic; the public is urged to contact the Snohomish County Sheriff’s Office with any information.

SNOHOMISH COUNTY, Wash. - What began as an ordinary Tuesday hike nearly two decades ago remains one of the most high-profile unsolved mysteries in Snohomish County .

On a

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