Just before 9 p.m. on Sept. 24, 1973, 18-year-old Becky Thomson was leaving to buy groceries and asked her 11-year-old half-sister, Amy Burridge, if she wanted to tag along. The two traveled in Becky’s Ford station wagon to the Thriftway store on 12th and Melrose streets in Casper, Wyoming. When Becky and Amy came out [...]
