Authorities had originally said Ramos came in through the door she’d propped open. However, the door did not lock, police said. State police said Tuesday that the teacher who at one point propped open an exterior door to the school had closed it before the gunman used it to get inside. The revelation raised new questions about whether lives were lost because officers did not act faster to stop the gunman, who was ultimately killed by Border Patrol tactical officers. Steven McCraw, head of the Texas Department of Public Safety, said Friday that after following the gunman into the building, officers waited over an hour to breach the classroom. The blame for an excruciating delay in killing the gunman - even as parents outside begged police to rush in and panicked children called 911 from inside - was placed on the school district’s homegrown police chief, Pete Arredondo, after the director of state police said Arredondo made the “wrong decision” not to breach the classroom, believing the gunman was barricaded inside and children weren’t at risk. Department of Justice is reviewing law enforcement actions. Investigators continue to seek answers about how police responded to the shooting, and the U.S. “That’s all we’re focused on right now - her, getting her back and being able to put her to rest,” Salazar said of Layla.