these things don't happen in yosemi yosemite. >> yosemite actually means the people who killed. >> you never expect so much terror to happen in such a beautiful place. ♪ >> this story starts in merced, california. it's in the middle of nowhere, surrounded by almond groves and peach orchards. >> it's a small farming town in the central valley of california, which is in the huge shadow of yosemite. merced, they call the gateway to yosemite. ♪ i started singing bye, bye miss american pie ♪ >> we're talking 1972. "american pie" was on the radio. ♪ singing this'll be the day that i die ♪ >> it's the year of watergate. it was the year that pong was introduced. "the brady bunch." ♪ that's the way we became the brady bunch ♪ >> the stayners lived on bette street. it was a middle class kind of a neighborhood. >> the parents were delbert and kay, and cary was the oldest of five children, he had a younger brother, steven, and three sisters too. >> del worked as a mechanic in a peach cannery. >> his mother kay was always described as distant, somewhat aloof. a woman who raised her children with so