Artist Abel Ortiz (L) gives US Attorney General Merrick Garland (R) a tour of murals of shooting victims on January 17, 2024 in Uvalde, Texas. The Justice Department is planning this week to release findings of an investigation into the 2022 school shooting in which 21 people were killed.

Children's lives may have been saved if officers had responded differently to a gunman who opened fire at Robb Elementary School, the Justice Department said in its report on the 2022 mass shooting that killed 21 people, including 19 students.

Poor coordination, training and execution of active-shooter protocol contributed to a law enforcement response that can only be described as a "failure," the report said.