An insightful profile of the Green River Killer, Gary Ridgway, who recently confessed to the murder of 48 women in Washington State. Ridgway, who claimed Choking is what I did and I was pretty good at it, received life in prison without parole, rather than execution. In his confession, read aloud in court by the prosecutor, he wrote, I picked prostitutes because I thought I could kill as many of them as I wanted without getting caught.