Investigators had previously said the teacher had propped the door open before the shooter entered the school in Uvalde, Texas, on May 24.
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The Robb Elementary School teacher who propped open an exterior door that law enforcement said a gunman used to get inside and kill 19 students and two teachers had closed the door but it did not lock, state police said Tuesday.
Investigators initially said the teacher had propped the door open before Salvador Ramos, 18, entered the school in Uvalde, Texas, on May 24. Investigators have now determined that the teacher, who has not been identified, propped the door open with a rock, but then removed the rock and closed the door when she realized there was a shooter on campus, said Travis Considine, chief communications officer for the Texas Department of Public Safety. But, Considine said, the door did not lock.