The police said Adriana Martinez Reyes, who told them the teenager behind the school shooting in Uvalde, Texas, was her son, threatened to harm a man during an altercation.
More than a dozen students remained alive for over an hour before officers entered their classrooms. The commander feared a risk to officers’ lives, new documents show.
The shooting that left 21 people dead at an elementary school was the second such plot in four years. Residents are left grappling with the question of what could have been done to stop it.