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Updated Oct. 28, 2025 — 9:15 a.m. PDT
AUBURN, Wash. — One person is dead and a motorist is jailed on suspicion of driving under the influence after a three-car crash shut down southbound State Route 167 in Auburn on Monday morning. The Washington State Patrol said the collision happened near the 15th Street Northwest interchange, closing the freeway for more than four hours and pushing commuter traffic onto city streets.
The crash was reported around 6:45 a.m. Monday. According to preliminary information, a southbound vehicle rear-ended a second car at highway speed, which then struck a third vehicle. One sedan bore the brunt of the impact, leaving its occupant trapped and critically injured. Emergency medical personnel pronounced the person dead at the scene.
Fire and rescue crews from Auburn and the Valley Regional Fire Authority arrived within minutes. Using hydraulic extraction tools, they worked to open the crumpled cabin before the medical examiner's office took over. The highway remained an investigative scene for hours, with detectives from WSP's Collision Investigation Unit measuring skid marks, photographing vehicle positions, and flying a drone over the area to map the wreckage.
The other two drivers were checked by medics, who found no injuries requiring hospital transport. A Washington State Patrol spokesperson said both cooperated with troopers and no one attempted to flee.
Southbound drivers were turned away at 15th Street Northwest and routed through Auburn's downtown grid. Traffic cameras captured stop-and-go conditions from the Auburn/Black Diamond exit back beyond the 8th Street interchange, with some commuters reporting delays of over an hour. Sound Transit acknowledged 10 to 15 minute delays on bus routes 578 and 586 but reported no canceled trips.
The Washington State Department of Transportation lifted the full closure just before 11:30 a.m., allowing lanes to reopen for the midday traffic.
The driver accused of starting the chain reaction was arrested at the scene. The suspect, described as a man in his early 30s from Auburn, was booked into the King County Jail on suspicion of DUI and vehicular homicide.
Troopers said they detected indications of impairment during their initial contact, but a definitive blood-alcohol result is still pending. A blood sample is being analyzed at the Washington State Toxicology Laboratory, a process that typically takes four to six weeks. Investigators also obtained a search warrant for the suspect vehicle's event data recorder, commonly called a black box, which could show speed and braking in the seconds before impact.
Washington law allows officers to hold an arrested suspect for up to 48 hours before a judge must see the case. That probable cause hearing is expected to take place in King County court within a day or two.
If prosecutors file vehicular homicide charges, the case will hinge on whether impairment was a proximate cause of the death — not just a substance present in the driver's system.
"It's not enough for the state to prove the driver had been drinking," said a Seattle defense attorney experienced in DUI and vehicular homicide cases, who spoke on condition of anonymity because he is not involved in this investigation. "There has to be a causal connection. That's where accident reconstruction becomes the center of the case."
Vehicular homicide in Washington is a class A felony, carrying a maximum sentence of life in prison and a $50,000 fine. A prior DUI conviction would trigger a mandatory minimum sentence of six years, making any plea negotiations substantially harder.
Monday's crash is at least the second fatal collision on a state highway serving Auburn in the past month. In late September, a motorcyclist died on nearby SR 18 after a crash involving a suspected impaired driver.
SR 167 carries a heavy mix of freight trucks and commuter vehicles through Auburn, Kent, and Renton, with posted speeds of 60 mph in several stretches. Safety advocates have pressed for upgrades for years. The 167 Corridor Safety Coalition — a group of local police chiefs, city planners, and business organizations — has called for median barriers, improved lighting, and more frequent patrols along the Auburn segment.
WSP data reviewed for this story shows at least 26 fatal or serious-injury crashes on the Auburn portion of SR 167 between 2020 and 2024. The coalition's 2025 report urged WSDOT to fast-track improvements, and the department says a corridor study is underway, with some projects expected to be prioritized within the next two years.
"We keep having these conversations after a tragedy, and then progress moves slowly until the next one," said Auburn City Council member Sarah Chen, who represents the district that includes the corridor. "The crash rate here is a public safety emergency, not just a traffic statistic."
Statewide, the Washington Traffic Safety Commission says impaired driving is a factor in roughly 40 percent of all traffic deaths. In King County, alcohol was involved in 68 fatal crashes in 2024, the highest total in the county in five years, according to commission data.
The timing of this collision is notable, coming just weeks before the Thanksgiving holiday period, when DUI fatalities historically spike.
"We know the next six weeks are the deadliest of the year for impaired driving," said Becky Phillips, Pacific Northwest program director for Mothers Against Drunk Driving. "What happened in Auburn could happen in any community — and we all have a role in making sure it doesn't."
WSP is asking anyone who saw the crash, or who drove past in the minutes before it happened, to contact detectives. Dashcam video from surrounding vehicles could help investigators establish the exact movement of all three cars before the impact.
"You might not realize that what you recorded matters," the WSP spokesperson said. "Let us make that call. We'd rather review extra footage than miss the one piece that explains what happened."
Witnesses can reach WSP's North Bend detachment at 425-649-4370 or submit tips through the WSP mobile app and social media channels.
The King County Medical Examiner's Office has not yet released the victim's name, pending family notification. A preliminary cause-of-death determination is expected later this week.
The King County Prosecuting Attorney's Office will review the WSP investigation before deciding whether to file formal charges, a process that typically takes two to four weeks. The suspect is expected to appear before a judge within 48 hours of the arrest.
Anyone who sees a driver weaving, braking erratically, or driving without lights is urged to call 911 and provide the vehicle's license plate, location, and direction of travel. Local officers say calls like those have prevented crashes more than once.
This is a developing story and will be updated as new information becomes available.
