https://abcnews.go.com/amp/US/texas-...ry?id=84940951The suspect was immediately engaged outside the building as he approached the school by a Uvalde Independent School District police officer, who was shot by the suspect, the sources said. After that, the suspect entered the school, barricaded himself in a classroom and allegedly opened fire, killing 18 students, who were mainly third- and fourth-graders, as well as one teacher, the sources said.
There, he traded gunfire with Uvalde ISD officer and Border Patrol Tactical Unit agents, a number of whom have children who attend the school, according to the sources. The Border Patrol agents responded to a law enforcement request for assistance.
Notice it doesn't say "A Border Patrol agent who was working nearby when the shooting began rushed into the school without waiting for backup and shot and killed the gunman"