Watch Uvalde school shooting video obtained by Statesman showing police response

The gunman walks into Robb Elementary School unimpeded, moments after spraying bullets from his semi-automatic rifle outside the building and after desperate calls to 911 from inside and outside the Uvalde school.

He slows down to peek around a corner in the hallway and flips back his hair before proceeding toward classrooms 111 and 112.

Seconds later, a boy with neatly combed hair and glasses exits the bathroom to head back to his class. As he begins to turn the corner, he notices the gunman standing by the classroom door and then firing...