PROSSER — After leading multiple law enforcement agencies on a lengthy pursuit and a 4-hour standoff, a 56-year-old from Grandview man is dead.

Authorities hadn’t released the name of the man as of press time.

The chase started at Outlook Road and Yakima Valley Highway near Outlook when a Washington State Patrol trooper noticed a speeding vehicle, the Benton County Sheriff’s Office said.

The trooper tried to stop the vehicle, but the driver failed to yield.

Yakima County Sheriff’s Office Public Information Officer Casey Schilperoort said his agency received an agency assistance request as the suspect continued to drive toward the city of Sunnyside.

The pursuit traversed Yakima Valley Highway to Scoon Road in Sunnyside, and law enforcement learned the vehicle was reported stolen from Grandview.

The driver continued north on Scoon to Van Belle Road and turned east to Washout Road.

The chase continued south through Sunnyside on Washout Road, which becomes 16th Street and eventually SR-241 at Alexander Road. The driver led law enforcement south on SR-241 to SR-22 at Mabton and east to Prosser.

In the city of Prosser, the suspect vehicle turned around in a motel parking lot and officers were able to see the suspect brandish a weapon, Schilperoort said.

The vehicle left the parking lot and the pursuit continued to an area near Rothrock and Snipes roads, Benton County said.

At that point, the vehicle stopped, and Benton County deputies were able to assist at the scene, attempting to negotiate with the suspect.

“the driver was confrontational with the officers and threatened suicide by police,” Benton County officials said.

The Tri-Cities Regional SWAT team was activated and negotiations continued as a negotiator attempted to get the man to surrender “peacefully.”

He was taken into custody but grew combative before a taser was deployed.

The man stopped breathing and CPR was administered while he was rushed to a nearby ambulance, officials stated.

The man, despite attempts to revive him, was pronounced dead a short while later.

Officials said pills, a methamphetamine pipe, drug paraphernalia and a pistol were located inside the vehicle the man was driving.

The investigation was still under way as of press time.

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