>> The news at ten starts right now. >> Well, the green River killer terrorized Washington for years. In the end, he pled guilty to the murder of nearly 50 women and teens leaving families throughout our state in grievin. While Ridgway has been locked up for decades, Fox 13 has learned he has returned to western Washington, locked up in a new location. Good evening, and thanks for joining us for Fox. 13 News at Ten. I'm Matthew Smith, David Rose has the night off. >> And I'm Sabirah Rayford. He was booked into King County Jail this morning. Fox Thirteen's neo Wong has been tracking down details. Niya, do we know when he was moved? >> Well, the King County Prosecuting Attorney's Office says Ridgway had been at the Washington State Penitentiary in Walla Walla. That is, until he was booked into King County Jail at 1042 this morning. After he was revealed as the green River killer. Gary Ridgway is known as one of the state's most infamous serial killers. >> It'll never end. And first of all, it never ends for the families and the victims. >> Retired homicide detective Cloyd Steiger remembers Ridgway's reign of terror. Though he didn't work on the investigation, he had colleagues who did and believes these could be the reasons for Ridgway's return. >> Either he's being charged with a new crime he wasn't charged with before, or he has to be resentenced on one or more of his charges from before, because there's some technicality. >> The King County Prosecuting Attorney's Office says Ridgway hasn't been charged, but he is in an institutional hold. Beyond that, no other details have been shared. The King County Sheriff's Office only sent us this statement saying since Gary Ridgway's arrest in 2001 pertaining to the green River murder investigation, the King County Sheriff's Office continues to actively investigate potentially related cases. When Ridgway was sentenced in 2003, prosecutors took the death penalty off the table if he agreed to plead guilty to any and all future cases in King County, where his confession will be backed up with reliable evidence. Ridgway is currently serving 49 consecutive life sentences. >> If there's one victim that he wasn't charged with that he should have been, then they need to have their day in court to. >> So we know where Ridgway is tonight. We're still working on trying to get why he has returned to King County. And as soon as we do,