Some parents of the victims of the Uvalde school massacre are livid that video surveillance capturing the attack was leaked to the media.

The Austin-American Statesman and ABC-affiliate KVUE posted an 82-minute surveillance video of the mass shooting that left 19 children and two teachers dead.

The video confirms what was already known: that police, some heavily armed, waited more than an hour to stop the gunman.

CGTN’s Toni Waterman reports from Texas.