Already serving 48 life terms in the Green River killings, Gary Ridgway is expected to plead guilty to a 49th murder at his arraignment Friday at the King County Regional Justice Center in Kent.
Ridgway already confessed to killing 20-year-old Rebecca "Becky" Marrero in 1982 as part of the 2003 plea deal that spared him the death penalty.
Her remains weren't found until Dec. 21 when teenagers found a skull in a ravine at Auburn, south of Seattle. Ridgway was charged Feb. 7. He was brought from the Washington state Penitentiary at Walla Walla for the arraignment where Marrero's family will have the opportunity to confront him.