YUBA COUNTY (CBS13) — A man and woman wanted in a Washington state murder and in the disappearance of a teenager in Oregon were arrested in Yuba County on Wednesday afternoon.

David Joseph Pedersen, 31, and Holly Ann Grigsby, 24, of Portland, Ore., were arrested by the California Highway Patrol after being spotted in the car owned by the missing Oregon teen, 19-year-old Cody Myers of Oregon. A body matching the description of Myers was found Tuesday in Oregon.

Pedersen and Grigsby are suspected of stabbing Pedersen’s 69-year-old stepmother to death and also suspected in the disappearance of Pedersen’s father.

According to police, a CHP officer spotted Myers’ missing car Wednesday in unincorporated Yuba County at about 1 p.m. and asked Grigsby, who was standing outside the car, if she needed assistance. She told him no, that she was just stretching.

The officer drove off but then, remembering the report of the stolen vehicle with Oregon license plates, pulled back behind the vehicle, confirmed the car was linked to the manhunt and executed a felony arrest.

The couple surrendered without incident, but two handguns and a rifle were found in the car, a 1999 Plymouth.

According to police, Pedersen and Grigsby have been on the run since Sept. 28 when Pedersen’s stepmother, Leslie, was found stabbed to death in her Everett, Wash., mobile home. Leslie Pedersen, 69, was found in bed, her hands bound with duct tape and her head wrapped in a pillow soaked with blood. A sword lay nearby.

David Pedersen is a convicted felony on parole who has spent a majority of his adult life in prison. Grigsby also has served time behind bars.