SALEM, Ore. -- After what one investigator called a reign of terror on the WestCoast, two fugitives wanted for the murder of an Oregon teenager and for another murder inWashington State were arrested while on the run inCaliforniaWednesday.

OregonState Police said Thursday David Joseph Pedersen, 31, and Holly Ann Grigsby, 24, Cody were officialy named suspects in the murder of Cody Myers, 19, of Lafayette, Ore. whose body was found in the woods in the mid-Willamette Valley area Tuesday night.

He died of gunshot wounds to the head and chest, an autopsy showed.

The California Highway Patrol arrested the two Wednesday north of SacramentoinMyers' car. Police described them as persons of interest in Myers' disappearance. Loaded handguns and rifles were seized during the arrests and investigators were working to determine if they were used to kill Myers.

Myers vanished during a trip to Newport last weekend.

Background: Cody Myers found murdered

Yamhill County Capt. Ken Summers said despite the findings yet to come, they were sure the right people had been arrested.

A vicious, vile, reign of terror that affected the West Coast of the United States has come to an end, Summers said. We have the people and the predators are off the streets.

Pedersen and Grigsby were being held in California for weapons charges, possession of a firearm by a felon, unlawful taking of a vehicle and receiving stolen property.

They face charges in Oregon and Washington as well.

Photos: Wash. murder suspects captured

Investigators believe Pedersen killed his stepmother 69-year-old Leslie Pedersen on September 29 and then stole her Jeep and fled with Grigsby.

The Jeep was found Friday, abandoned in a remote location in Linn County, Oregon.

More: Timeline of murder investigations

Last Sunday, the two were filmed on a Salem gas station surveillance camera. In that video, a woman who looks like Grigsby was driving Myers' car, with a man in the passenger seat who looked like Pedersen. Myers was not visible in the car.

Police said the woman in the surveillance video also tried to use a credit card that belonged to Leslie Pedersen, in order to purchase gas.

Police have also issued an alert to find Pedersen's father, David Jones Pedersen, who has been missing since September 26 and feared dead.

The two have both done time in prison in Oregon and were considered armed and dangerous during the multi-agency manhunt earlier this week, Oregon State Police Lt. Gregg Hastings said.

More: Grigsby's dad, in Portland, talks about her history

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David Joseph Pedersen's convictions date to 1997, when he was 16 and convicted of robbery in Marion County, Ore., according to public records. He spent nearly six years in prison and was released in January 2003.

Less than a month later, he was arrested on charges that included assaulting a police officer in Eastern Oregon's Umatilla County. He was convicted on one count and spent seven years in prison, four of them at a federal prison in Colorado.

Grigsby spent time in prison for a variety of minor charges beginning in 2006, including identity theft and unauthorized use of a vehicle. After completing probation, she was again sentenced in 2008 on identity theft charges and served two years.

Anyone with information that may help investigators was urged to call a special tip line: 888-780-5678.

KGWReporterMarkHanrahan contributed to this report

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