UMATILLA COUNTY, Ore. (17 July 2026) – On Thursday, July 16, 2026, at 8:27 a.m., the Oregon State Police responded to a single-vehicle serious injury crash on Interstate 84 eastbound near milepost 207 in Umatilla County. 

The preliminary investigation indicated a gray Dodge Durango, operated by Cullen Michael Derr (38) of Battle Ground (WA), was traveling eastbound while towing a custom-built utility trailer when, for unknown reason, it left the roadway.  The vehicle rolled multiple times and caught fire.   

Three occupants were ejected from the vehicle during the crash, including a 24-year-old woman, a 15-year-old male and a 9-month-old male infant.  All four occupants, including Derr, were transported to a local hospital.  Due to the severity of their injuries, the three passengers were later transferred to hospitals in Oregon and Washington for advanced medical care.  

Derr was arrested for DUII, reckless driving, reckless endangering another person (x3), assault 3 (x3), and lodged at the Umatilla County Jail.   

Interstate 84 was impacted for approximately one hour during the on-scene investigation.   

OSP was assisted by the Pendleton Police Department, Pendleton Fire & Ambulance Department, the Umatilla County Sheriff's Office, and the Oregon Department of Transportation.     

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About the Oregon State Police Collision Reconstruction Unit (CRU)  
The Oregon State Police Collision Reconstruction Unit (CRU) is a specialized unit responsible for investigating fatal and critical injury collisions on Oregon’s highways. The team provides expertise in documenting, investigating, and analyzing complex motor vehicle crashes and crime scenes. They receive specialized training in using advanced measuring techniques and small unmanned aircraft systems (sUAS) for on-scene investigations. The CRU team includes ACTAR-accredited collision reconstructionists and technical collision investigators deployed across the state.