Arlington, WA – The Washington State Patrol has activated a Missing Indigenous Person Alert (MIPA) for 16-year-old Alyssa Klein, who was last seen around 9 a.m. Sunday, December 21, 2025, near the 17500 block of 73rd Avenue NE in Arlington, Snohomish County.
According to the Arlington Police Department, Alyssa is considered at-risk. She is described as 5 feet 3 inches tall, weighing 280 pounds, with brown hair and brown eyes. Officials say she may be wearing red and black pajama pants and a gray zip-up hoodie.
The Washington State Patrol noted Alyssa has long hair with a blue stripe and often wears it in a braid. She also has a nose piercing.
Authorities are asking anyone who sees Alyssa or knows of her whereabouts to call 911 immediately and reference Case #2025-00024456. The agency’s non-emergency line is 425-407-3999.
The alert remains active as police continue their search in the Arlington area.
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