SEATTLE — Gary Ridgway, a mass murderer known as the "Green River Killer," has been transferred from the Washington State Penitentiary in Walla Walla to the U.S. Penitentiary in Colorado.
He was transferred on May 14, 2015, according to the State Department of Corrections.
PHOTOS FROM GARY RIDGWAY CONFESSION TAPES
He was 52 when he was arrested. He's now 66-years-old.