Uvalde Police and the school district are no longer cooperating with a Texas investigation into police response, ABC News reports

An ABC News report said that the Uvalde Police Department and the police force at the Uvalde School District were no longer cooperating with an investigation by the Texas Department of Public Safety.

Local law enforcement has been under incredible scrutiny over the mass shooting at the Uvalde Elementary School. Police have revised initial statements about their response to the attack several times, leading to greater criticism.

ABC News said multiple law enforcement sources confirmed their report.

The decision was reportedly made after a heart-wrenching press conference on Friday by Col. Steven McCraw, the head of the DPS, where he said that the decision to delay entry into the classroom was against protocol and the wrong decision.

McCraw told reporters that the on-scene commander wrongly “believed that it had transitioned from an active shooter to a barricaded subject."

He went on to give a timeline of the events of the day that showed how long police waited to go into the classroom and neutralize the shooter despite 911 calls from children who were still inside.

“Obviously, based on the information we have, there were children in that classroom that were still at risk,” McCraw concluded. “From the benefit of hindsight where I’m sitting now, of course, it was not the right decision. It was the wrong decision. Period.”

He also revealed that video evidence showed a teacher had propped open the door that the suspect used to gain entry into the school.

ABC News said a spokesperson for DPS declined to comment on the report.

19 school children and two teachers were murdered in the attack with more than a dozen injured. Many on the left have responded to the horrific massacre by renewing calls for increased gun control legislation.

Here's more about the investigation into the mass shooting:

Official says police made 'wrong decision' not to enter classroom in Uvalde school shooting l ABC7www.youtube.com