ARLINGTON — A 13-year-old boy who walked out of a parent conference at Boles Junior High School Monday, saying he had to use the restroom and wanted a drink of water, fatally shot himself, police said. The seventh-grader was pronounced dead at Medical Center of Arlington, where his mother works as an intensive-care nurse. The 'Star-Telegram is withholding the teen-ager's name because of his age and the nature of the tragedy. About 4:10 p.m., about 15 minutes after... (GunPolicy.org)