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California Highway patrolman struck, killed by pickup has Minnesota, North Dakota ties

Kirk Griess

SOLANO, Calif.—A 46-year-old California Highway Patrol officer who was fatally struck by a vehicle Aug. 10 while he was making a traffic stop has regional ties.

Motorcycle officer Kirk Griess of Vacaville was hit by a pickup truck during a traffic stop on I-80 in Fairfield, 47 miles northeast of San Francisco.

Born in Robbinsdale, Minn., Griess grew up in Detroit Lakes, Minn., and attended high school in Wahpeton, N.D. His parents, Sheldon and Helen Griess, later moved to Park Rapids, Minn. Helen Griess said her son, a 19-year veteran of the Patrol, was planning to retire in five years and considered moving to the area.

Also killed was the driver of the SUV Griess had pulled over, identified as Jaime Bueza Manuel, 49, of Vallejo, Calif., a national of the Philippines.

Sean Matthew Walker, 36, of Rocklin, Calif., has been identified as the driver of the pickup that killed Griess and Manuel. According to news reports, Walker was treated at a hospital for his injuries and was released later the same day.

Walker was subsequently arrested on suspicion of two counts of felony vehicular manslaughter and one count of reckless driving causing fatal injuries.

"We have evidence that (Walker) was distracted by his phone at the time of the collision," said Capt. Mark Headrick, commander of the CHP's Solano office, in an Aug. 15 press conference.

"This is a preventable collision, something that could have been stopped," said Headrick. "We want the message to be sent that your actions have consequences, that answering a phone or sending or answering a text can result in the tragic consequences that we witnessed this last week, and that lives can be unalterably changed because of these actions. We want to encourage people to be safe, to drive safe, and to consider that there are other people on the roadways, and to drive safely for them."

During the same press conference, Solano County District Attorney Krishna Abrams said her office had filed charges of two counts of gross vehicular manslaughter against Walker, because "this wasn't simple, ordinary negligence; this was gross negligence."

Abrams said evidence showed both that Walker was talking on his cell phone before the accident and that he was driving "well over the speed limit."

Griess was also a U.S. Marine Corps veteran. He is survived by his wife, Keri, and children Kadi, 25, Kaci, 21, and Kole, 14..

A funeral with full military honors was held Friday, Aug. 17, in California. A memorial service is also tentatively scheduled for Sept. 22 at Peace Lutheran Church in Nevis, Minn.

Helen Griess confirmed that a memorial trust fund has been created in Griess's name to benefit his wife and children. Donations can be made online at or by mailing a check payable to the fund to Officer Kirk Griess Memorial Fund, CAHP Credit Union, P.O. Box 276507, Sacramento, CA 95827-6507.

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