Watch Online Movies HD Fmovies. The documentary explores what it’s like to grow up the child of one of the most prolific serial killers in American history, Gary Ridgway, the infamous Green River Killer. This special unpacks Ridgway’s horrific crimes, the double life he led, the twenty-year police investigation that brought him down, and the long-lasting effects of a father’s unspeakable sins on his son and family.