Acting Uvalde police chief Lt.

Mariano Pargas has been placed on leave after a preliminary report on the school shooting by the Texas House investigative committee found 'multiple systemic failures' and poor leadership.

Lead investigator and Republican state Rep.

Dustin Burrows argued Robb Elementary was 'not adequately prepared for the risk of a school shooter' and warned the same is true of many schools across the U.S.

On Sunday, Lt. Mariano Pargas, who was acting Uvalde Police Department chief the day of the shooting, was placed on leave.

Robb Elementary School Police Chief Peter Arredondo was also at the scene, standing outside the classroom, trying to negotiate with gunman Salvador Ramos.

The committee claimed 'multiple systemic failures' witnessed in Uvalde are found 'across the entire state and country' and the systems in place 'are something that we can and must improve.'

The investigative committee released its 77-page investigative report Sunday, marking the most exhaustive attempt so far to determine why it took more than an hour for police to confront and kill the 18-year-old gunman at Robb Elementary School on May 24.

The report blasted 'system failures and egregious poor decision making' by nearly all those in power during the attack and slammed law enforcement for 'failing to prioritize saving the lives of innocent victims over their own safety'.