ARLINGTON, Texas (AP) — Police says one student was fatally shot and another injured when a third student opened fire outside a Dallas-area high school Monday morning before being arrested on murder charges. Officials say the shooting began on a high school campus in the suburb of Arlington around 6:55 a.m., before many students arrived for the first day back to classes after the spring break. Arlington police Chief Al Jones says a male student who was shot died at a hospital and a female student was receiving medical care after being “grazed” by gunfire, causing injures that aren’t life threatening. He said another male student was arrested at the scene.