DALLAS (AP) — Police videos and 911 calls from the 2022 Uvalde, Texas, school massacre, which left 19 students and two teachers dead, were released Saturday by city officials after a prolonged legal fight.

The release of the records came in response to a lawsuit brought by The Associated Press and other news organizations after Uvalde officials refused to publicly release documents related to the shooting at Robb Elementary School.

The delayed law enforcement response — nearly 400 officers waited more than 70 minutes before confronting the gunman in a classroom filled with dead and wounded children and teachers — has been widely condemned as a massive failure. The gunman killed 19 students and two teachers on May 24, 2022, one of the worst school shootings in U.S. history.

Multiple federal and state investigations into the slow response laid bare cascading problems in training, communication, leadership and technology, and questioned whether officers prioritized their own lives over those of children and teachers in the South Texas city of about 15,000 people 80 miles (130 kilometers) west of San Antonio. Families of the victims have long sought accountability for the slow police response.

Two of the responding officers now face criminal charges: Former Uvalde school Police Chief Pete Arredondo and former school officer Adrian Gonzales have pleaded not guilty to multiple charges of child abandonment and endangerment. A Texas state trooper in Uvalde who had been suspended was reinstated to his job earlier this month.

Some of the families have called for more officers to be charged and filed federal and state lawsuits against law enforcement, social media, online gaming companies, and the gun manufacturer that made the rifle the gunman used.

The police response included nearly 150 U.S. Border Patrol agents and 91 state police officials, as well as school and city police. While dozens of officers stood in the hallway trying to figure out what to do, students inside the classroom called 911 on cellphones, begging for help, and desperate parents who had gathered outside the building pleaded with officers to go in. A tactical team eventually entered the classroom and killed the shooter.

Previously released video from school cameras showed police officers, some armed with rifles and bulletproof shields, waiting in the hallway.

A report commissioned by the city, however, defended the actions of local police, saying officers showed “immeasurable strength” and “level-headed thinking” as they faced fire from the shooter and refrained from firing into a darkened classroom.