The US Department of Justice (DOJ) announced Sunday it will investigate local law enforcement's response to the shooter at Robb Elementary School in Uvalde Texas, who killed 19 children and two teachers.
This is in addition to separate investigations set to be launched by other authorities, both at state and county levels.
Investigations will focus on officers' slow response time. Police waited around and stopped others from entering the school to help teachers and students.
A press conference last week revealed 19 officers were stationed in the hallway of the school for over an hour before the shooter was killed.
According to Reuters, "Uvalde law enforcement agencies allowed the shooter to remain in a classroom at Robb Elementary School for nearly an hour while officers waited in the hallway and children inside made panicked 911 calls for assistance."
The shooter was eventually killed by a security team who stormed the school in defiance of police orders to remain outside.
DOJ spokesperson Anthony Coley said Sunday the official category of the report is a "critical incident review."
"The goal of the review is to provide an independent account of law enforcement actions and responses that day, and to identify lessons learned and best practices to help first responders prepare for and respond to active shooter events," Coley said.
Coley also said, "The Justice Department will publish a report with its findings at the conclusion of its review."