 Former school officer Adrian Gonzalez also was indicted on multiple similar charges. Arredondo was the on-site commander during the attack over two years ago, in which an 18-year-old gunman opened fire in a fourth-grade classroom, where he remained for more than 70 minutes before officers confronted and killed him. In total, 376 law enforcement officers massed at Robb Elementary School, some waiting in the hallway outside the classroom, even as the gunman could be heard firing an AR-15-style rifle inside.