UPDATE as of 2:35 p.m.: The driver has been identified as William R. Barnes Jr., a 35-year-old Olympia resident.
Washington State Patrol investigators are looking for anyone who witnessed the events leading up to a fatal crash late Wednesday in the northbound lanes of Interstate 5 near Nisqually.
A man driving a stolen pickup truck was speeding north on I-5 about 11:10 p.m. A trooper watched as the driver used the shoulder to pass a semi truck.
The driver then cut in front of the truck at Marvin Road, forcing the semi truck driver to brake to avoid a crash, the State Patrol reported.
The trooper pulled from the shoulder into traffic and caught up to the pickup truck. The trooper activated his emergency lights and sirens to initiate a stop.
The pickup truck drove partially on the right shoulder, then swerved to avoid a DOT sign. The truck went across all lanes of traffic, then rolled off the highway and into the median just south of Mounts Road.
The driver, who was not wearing a seatbelt, was ejected and died at the scene. His name has not yet been released.
The State Patrol’s Major Accident Investigation Team is investigating the crash.
Detectives ask anyone who spotted the events leading up to the pursuit or the crash to call 360-805-1192 or 360-805-1160.