In the 1980s, police found the bodies of dozens of young women near the banks of the Green River and throughout the Seattle areas forests. But it wasnt until 2001 that DNA evidence allowed authorities to link Gary Ridgway to the slayings. After pleading guilty, he supplied the names and locations of other victims as part of a plea bargain to avoid the death penalty. He is now serving 48 consecutive life sentences without any chance of parole. The Final Report: Green River Killer uses interviews with authorities involved to analyze the investigation and exposes rarely-seen confession tapes to reveal the motivation behind the most prolific serial killer in U.S history.