The police handling of the school shooting in Uvalde, Texas is being urged by a US congressman to be investigated by the FBI.

The congressman from San Antonio wrote a letter to the FBI asking for a complete and comprehensive account of the killings at the school.

Castro highlighted the conflicting accounts of the police response, including the claim that an officer at the school exchanged fire with the suspected shooter before he entered the building.

—Joaquin Castro (@JoaquinCastrotx) May 26, 2022

At a press conference earlier on Thursday, Victor Escalon of the Texas Department of Public Safety said that the claim was not accurate and that the shooter entered the building unobstructed.

Castro highlighted the fact that police have failed to explain why they waited to intervene while the shooter was in the school, with a 90-minute period still not fully accounted for.

Parents tried to get law enforcement to enter the building during this time and confront the shooter. The police officer who responded to the shooting was killed by a Border Patrol agent.

In a statement to Insider, an FBI spokesman said the bureau received the letter, but didn't have any further comment.

The White House wouldn't be looking into the response, according to the press secretary.

She told reporters that authorities are working to piece together more details of what happened in Uvalde, so they won't prejudge the result from here.

Do you have a news tip? C Davis is the reporter for Insider.