The mall security guard who was shot and killed during the Texas massacre died after helping lead a shopper to safety and going back to try and save others — as authorities are still probing a motive in the rampage. Christian LaCour, 20, a security guard who worked at the Allen Premium Outlets, was busy working a shift on Saturday afternoon when Mauricio Garcia, 33, opened fire on shoppers with an AR-15-style rifle. Allen Chief of Police Brian Harvey said that in the chaos, LaCour rushed to save a person, leading them away from the gunman, who then set his...