UPDATE: Two suspects accused of a West Coast crime spree that included four murders have been indicted on federal charges.

David Pedersen, 32, and Holly Grigsby, 25 were arrested last October by a California Highway Patrol officer.

They are accused of a 10-day crime spree fueled by their white-supremacist beliefs that spanned from Everett, Wash., to Eureka, Calif.

Investigators said they murdered four people, including Oregon teen Cody Myers.

The suspects are also accused of killing Pedersen's father and stepmother.

The indictment said it was all part of a white-supremacist campaign to kidnap and murder people based on their race, religion and "perceived 'degenerate' conduct."

In a statement, U.S. Attorney Amanda Marshall said the hope is that the federal indictment will help bring justice to the victims' families.

The indictment falls under the Racketeer Influenced and Corrupt Organizations Act (RICO).

The long list of charges against the suspects includes conspiracy, kidnapping, carjacking, identity theft, credit card fraud and being a felon in possession of a firearm.

The indictment alleges they robbed victims in order to finance their plans and murdered victims to eliminate witnesses.

The goal of Grigsby and Pedersen, according to the indictment was to use "acts of violence and other criminal activity to promote a white supremacist movement to 'purify' and 'preserve' the white race."

The U.S. Attorney General will decide whether to seek the death penalty at a later date.

ORIGINAL STORY: The death penalty will not be sought against Holly Ann Grigsby, accused with boyfriend David Joseph "Joey" Pedersen of a West Coast killing spree last year in which Pederson's father and mother were killed, Snohomish County Prosecutor Mark Roe announced Friday.

"There is ample evidence that co-defendant David J. Pedersen's hatred for his father was the primary motivation for these crimes," Roe said in a statement. "This defendant (Grigsby) had no violent criminal history previous to this, is quite young at 24, and appears to have been following the lead of David J. Pedersen."

Pedersen pleaded guilty in March to killing his father and stepmother.  Roe decided not to seek the death penalty against Pedersen because, he said, there was credible evidence that Petersen's father had sexually abused him and others.

Pedersen, 31, and Grigsby, 24, fled south after the slayings in Everett and drew national attention as they went on an alleged killing spree along the West Coast. They are accused of killing a 19-year-old man in Oregon and a disabled man in California.

They were captured near Yuba City, Calif., last Oct. 5 and sent to Washington state to stand trial first for the killing of Pedersen’s father, David “Red” Pedersen, 56, and stepmother, Leslie “Dee Dee” Pedersen, 69.

The stepmother was found stabbed to death in her Everett home Sept. 29, 2011, and Pedersen was found shot in the head in his vehicle Oct. 8 in Linn County, Ore.

Roe, in announcing his decision not to seek the death penalty against David J. Pedersen, said, “The police investigation revealed that many years ago, when his children were young, the late David Pedersen engaged in child abuse. Significant, credible evidence exists that he engaged in multiple acts of child sexual abuse, victimizing his own children, and others.

“The defendant has repeatedly confessed to killing his father, and cited some of that abuse as a reason why. Whether that was his true, sole or only motivation is less certain, but what is certain is that any jury considering his fate would first hear hours, days, or perhaps weeks of testimony on the subject, some of it from the actual victims of the abuse.

“Neither my senior attorneys, myself, nor members of the investigative team believe that with what a jury would hear, there is any reasonable chance of them unanimously returning with a verdict of death for this defendant,” Roe said.

He added that there “doesn’t appear there was ever any wrongdoing at all by Leslie Pedersen,” the stepmother who was also killed.

Grigsby has pleaded not guilty to charges of aggravated murder.

According to charging documents, after being arrested in California, Grigsby sat down for a five-hour interview with Oregon State Police in which she recounted her and Pedersen's planned killing spree.

Grigsby told investigators that they killed 19-year-old Cody Meyers of Oregon "because his last name made them think he was Jewish," according to charging documents. Grigsby also reportedly commented that when she was arrested she said that the couple were on their way to Sacramento to "kill more Jews."

In an interview with the Appeal-Democrat, Pedersen admitted to killing his father and took responsibility for three other murders.

"Everything that's been reported I take full responsiblity for," he told the newspaper.