In the backseat, the baby started to cry. He turned the radio down and the Fleetwood Mac song faded away as he faced toward the little girl. "Shh, shh, baby. Daddy will be right back," he said, leaving the car running as he disappeared into the trees. Twenty years ago, Ed Finch - America's most notorious serial killer - used the Bay Area as his hunting ground. Now, his daughter, Margot, is a...