Nearly 20 officers stood in a hallway outside of the classrooms during the mass shooting for more than 45 minutes before agents used a master key to open a door and confront a gunman, authorities said.
Source: ABC News 6
Nearly 20 officers stood in a hallway outside of the classrooms during the mass shooting for more than 45 minutes before agents used a master key to open a door and confront a gunman, authorities said.
Source: ABC News 6