In Corpus Christi, Texas, a landmark trial begins as a former police officer is accused of failing to protect children during the tragic 2022 school shooting in Uvalde. Adrian Gonzales, once part of the Uvalde school police force, faces charges of child abandonment or endangerment, marking a rare legal action against law enforcement personnel for not adequately responding to a crime.

The devastating incident at Robb Elementary School resulted in the deaths of 19 students and two teachers, standing as one of the most lethal school shootings in American history. Despite the presence of nearly 400 officers from various law enforcement agencies, a staggering 77 minutes elapsed before a tactical team entered the classroom and neutralized the shooter, Salvador Ramos. Investigations later revealed Ramos had harbored violent obsessions leading up to the attack.

Gonzales, alongside former Uvalde school police chief Pete Arredondo, was among the initial responders. They are currently the only officers facing criminal charges for the delayed intervention. As the community watches closely, Arredondo’s trial date remains unannounced.

Nearly 400 officers from state, local and federal law enforcement agencies responded to the school, but 77 minutes passed from the time authorities arrived until a tactical team breached the classroom and killed the shooter, Salvador Ramos. An investigation later showed that Ramos was obsessed with violence and notoriety in the months leading up to the attack.

Gonzales and former Uvalde schools police chief Pete Arredondo were among the first on the scene, and they are the only two officers to face criminal charges over the slow response. Arredondo’s trial has not yet been scheduled.

The charges against Gonzales carry up to two years in prison if he is convicted. The trial, which is expected to last up to three weeks, begins with jury selection.

Gonzales pleaded not guilty. His attorney has said Gonzales tried to save children that day.

Police and Texas Gov. Greg Abbott initially said swift law enforcement action killed Ramos and saved lives. But that version quickly unraveled as families described begging police to go into the building and 911 calls emerged from students pleading for help.

The indictment alleges Gonzales placed children in “imminent danger” of injury or death by failing to engage, distract or delay the shooter and by not following his active shooter training. The allegations also say he did not advance toward the gunfire despite hearing shots and being told where the shooter was.

State and federal reviews of the shooting cited cascading problems in law enforcement training, communication, leadership and technology, and questioned why officers waited so long.

According to the state review, Gonzales told investigators that once police realized there were students still sitting in other classrooms, he helped evacuate them.

Some family members of the victims have said more officers should be indicted.

“They all waited and allowed children and teachers to die,” said Velma Lisa Duran, whose sister Irma Garcia was one of the two teachers who were killed.

Prosecutors will likely face a high bar to win a conviction. Juries are often reluctant to convict law enforcement officers for inaction, as seen after the Parkland, Florida, school massacre in 2018.

Sheriff’s deputy Scot Peterson was charged with failing to confront the shooter in that attack. It was the first such prosecution in the U.S. for an on-campus shooting, and Peterson was acquitted by a jury in 2023.

At the request of Gonzales’ attorneys, the trial was moved about 200 miles (320 kilometers) southeast to Corpus Christi. They argued Gonzales could not receive a fair trial in Uvalde, and prosecutors did not object.

Uvalde, a town of 15,000, still has several prominent reminders of the shooting. Robb Elementary is closed but still stands, and a memorial of 21 crosses and flower sits near the school sign. Another memorial sits at the downtown plaza fountain, and murals depicting several victims can still be seen on the walls of several buildings.

Jesse Rizo, whose 9-year-old niece Jackie was one of the students killed, said even with three-hour drive to Corpus Christi, the family would like to have someone attend the trial every day.

“It’s important that the jury see that Jackie had a big, strong family,” Rizo said.

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Associated Press writers Jim Vertuno in Austin, Texas, and Juan A. Lozano in Houston contributed to this report.