New Interior Image Released In Uvalde School Shooting Raises More Questions

The footage shows that multiple officers were inside the building with rifles and at least one ballistic shield, nine minutes after the gunman arrived. They didn't enter the classroom the shooter was inside for another 58 minutes.
https://www.kvue.com/article/news/special-reports/uvalde-school-shooting/interior-images-uvalde-police/269-b1be96cb-aa8a-4edc-aa51-d4cbd41382f4