Portland, OR -

A man accused of helping a couple charged in a 2011 Northwest crime spree pleaded guilty Wednesday in federal court in Portland.

Corey Eugene Wyatt pleaded guilty to transferring a firearm to David "Joey" Pedersen and helping Pedersen and his girlfriend Holly Ann Grigsby with a stolen vehicle.

The Oregonian reports the 29-year-old Wyatt faces up to 15 years in prison when he is sentenced in April.

Pedersen and Grigsby are awaiting trial on an indictment charging them with kidnapping, carjacking and murder as part of a white supremacist scheme.

Pedersen has already pleaded guilty to killing his father and stepmother in Everett, Wash. He and Grigsby also are accused of killing a man on the Oregon coast and another man near Eureka, Calif.