Day of the Dead by J.A. Jance (2004)

In thirty years a lot can change: people, places, even cultures. It was the days of Vietnam protests, flower power, and acid rock when Roseanne Orozco died in 1970. Back then, disco wasn't even a gleam in its daddy's eye, Iraq was only a patch of sand 8000 miles away, gas was twenty-three cents a gallon, and PC didn't mean personal computer or politically correct. Her body was found on the Papago Reservation a hundred miles or so west of Tucson, out in the barren Sonoran Desert. The killer was never identified - but we know who did it. Thirty years and more later, Roseanne's people have...