As acting Uvalde police chief resigns, questions remain about what Texas's top law enforcement agency did and didn't know about the school shooting
By Shimon Prokupecz, Matthew Friedman & Rachel Clarke
FIRST ON CNN: Acting police chief on day of Uvalde school massacre resigns from department, mayor says
By Shimon Prokupecz
Exclusive: New audio of phone call shows for the first time that a senior Uvalde officer was told children needed to be rescued from inside a classroom
By Shimon Prokupecz, Matthew Friedman & Rachel Clarke