SALT LAKE CITY (Feb. 19) -- At 1 a.m. last Tuesday, the parents of Sulejman Talovic called the police to report him missing. After watching television news coverage, they feared he might be among those dead or wounded in a shooting rampage at a mall here. One hour later, with the arrival of detectives, they discovered the shocking truth, that their son, 18, was the gunman. In six minutes on the night of Feb. 12, Mr. Talovic shot nine customers at the Trolley Square mall, killing five and seriously injuring four others. The attack ended when the police shot and...