It was 1970 and the night of a football game. Jimmy Allen Williams was 16, and he was probably on top of the world. Just six days earlier, he got himself a blue 1969 Camaro with a white top, considered a primo muscle car back then. And what better way to help break in his new wheels than by taking a drive with a couple of friends? So 18-year-olds Leah Gail Johnson and Thomas Michael Rios — fellow residents with Williams of Sayre, Oklahoma — piled into the sports car and the trio were supposedly headed for the game. They were never...