By Andy Sullivan (Reuters) – The U.S. Justice Department will review the law-enforcement response to a gunman’s killing of 19 pupils and two teachers on May 24 at a school in Uvalde, Texas, and make its findings public, U.S. Attorney General Merrick Garland said on Wednesday. The “critical incident review” is prompted by growing anger over a police failure to swiftly confront the gunman. The 18-year-old shooter was allowed to remain in a classroom at Robb Elementary School for nearly an hour while officers waited in a school hallway and children in class made panicked phone calls for help. A U…