“Critical failures” delayed the police response to the 2022 shooting in Texas that killed 19 children and two teachers, according to a damning US Department of Justice review.

The report found shortcomings in “leadership, decision-making, tactics, policy and training” that led to a confused response to the gunman at Robb Elementary School in Uvalde.

Officers should have immediately broken into the classroom to confront the gunman – but instead they treated him like a barricaded subject and left him inside with victims for more than an hour.

“The resulting delay provided an opportunity for the active shooter to have additional time to reassess and reengage his deadly actions inside the classroom,” the report added.

“It also contributed to a delay in medical interventions with the potential to impact survivability.”

There were at least 10 “stimulus events” over the course of an hour that could have driven police to take steps under active shooter protocols to “immediately stop the killing”.

“During that period, no one assumed a leadership role to direct the response towards the active shooter, provide situational status to responding officers, establish some form of incident command, or clearly assume and communicate the role of incident commander,” the report continued.

The report also outlines how authorities gave wrong information to parents in the aftermath of the shooting about whether their children had survived or not.

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