State troopers responded to the scene, Highway 7 at Pilgrim Road East, at about 10:45 p.m. Sunday after receiving reports of a serious crash.
Arriving there, they found a 48-year-old University Place man dead at the scene. He had been riding as a passenger in the 1990 Toyota pickup. His identity is being withheld pending notification of his next of kin.
The driver of the vehicle, a 25-year-old man from Fort Riley, Kan., was injured. He was taken to Good Samaritan Hospital and is suspected of driving while intoxicated and vehicular homicide.
A preliminary investigation found that the pickup was headed north on Highway 7 at Pilgrim Road East when it veered off the roadway, slammed into the guardrail and rolled over. The vehicle came to rest in the northbound lane.
The highway was blocked for about four hours as troopers investigated and cleaned up the crash scene.