Preliminary report of the investigation into the shooting in Uvalde reports flaws in the police chain of command and deficiencies in the security of the school

This Sunday the preliminary report of the investigation into the shooting at a school in Uvalde that left 19 students and 2 teachers dead was published.

This report includes details about the attacker as well as deficiencies in communication and security at the school.

On the other hand, failures are reported in the police chain of command.

CNN's Gustavo Valdés reports on the document.