Two 16-year-old girls were arrested Friday in the fatal shooting of an 18-year-old at a Walmart in Temple two days earlier. One of the girls turned herself in about 7:20 p.m. at the Temple Police Department. The other girl was arrested about an hour later at her home, police said. Both face a murder charge in the death of Isaac Kohlhaas. Their names have not been released because they are juveniles. Officers responded about 9:45 p.m. Wednesday to the Walmart in the 6800 block of West Adams Avenue, where they found Kohlhaas with a gunshot wound, police said. He was taken to a local hospital, where he died.