The Darkest Night On a chilly autumn night in 1973, Casper, Wyoming' s picturesque steel bridge was the scene of a horrific crime. Two young half-sisters, Amy Burridge and Becky Thomson, were abducted, raped, and thrown from the bridge into the swiftly flowing waters 110 feet below. Author and Casper native Ron Franscell was just a child when the crime shattered his close-knit community, brutally ending the life of Full description