FLAGSTAFF, Ariz.—Late on a fall evening in 2001, Alyce Slim and her granddaughter stopped at a gas station on the Navajo Nation after searching for a traditional healer for leg ailments.
There, in an area where hitchhiking is common, Slim agreed to give two males a ride. They got into her pewter-colored pickup truck and when she stopped later to let them out, they didn’t budge.