Investigators are trying to determine why an exterior door at Robb Elementary School did not lock when it was closed before a gunman used it to get inside and kill 19 students and two teachers. Investigators initially said a teacher propped the door open before 18-year-old Salvador Ramos entered the school in Uvalde, Texas, on May 24. Travis Considine, spokesman for the Texas Department of Public Safety, said Tuesday that investigators have determined the teacher propped the door open with a rock but removed it and closed the door when she realized a shooter was on campus. But the door did not lock. The teacher has not been identified.
Texas police: Teacher closed propped-open door before attack
