MARYSVILLE, Calif. (AP, posted Sept. 13, 2016) — An investigator "with a bit of free time" decided to send for testing DNA samples from a long-dormant cold case, which led authorities to arrest a pair of men linked to the 1973 shotgun slayings of two young girls, authorities said.

Police in Oklahoma and California arrested the two 65-year-old suspects Tuesday morning for the murders of Valerie Janice Lane, 12, and Doris Karen Derryberry, 13.

The seventh grade classmates told their mothers they were going to a mall shopping near their homes about 40 miles north of Sacramento on Nov. 12, 1973. W...