ARLINGTON — Officials have confirmed that a medical problem caused a fatal crash on I-5 near Arlington on Sunday.
Roland R. Koepernick, 66, of Snohomish, died from natural causes, according to the Snohomish County Medical Examiner’s Office.
His pickup smashed into a fence around 10:20 a.m. in the northbound lanes near the Smokey Point exit.
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