Three court documents used in the criminal investigation of a 1971 South Dakota cold case involving two missing Vermillion girls have been unsealed.
Attorney General Marty Jackley released the 48 pages but without the names of nine reported victims of sexual assault.
A judge used the documents in 2004 to grant three search warrants at the boyhood home near Alcester of David Lykken who was indicted for killing Cheryl Miller and Pamella Jackson.
Those charges were later dropped and Jackley said in April the girls died in a car accident when their Studebaker drove off a gravel road and landed in a creek.
It was unseen until the past year when the car was discovered in the creek bed.
Lykken remains in prison, serving a 227-year sentence for an unrelated rape and kidnapping.