The teenage gunman in the 2022 Robb Elementary School massacre entered school in Uvalde, Texas, as a bright learner before years of escalating academic and behavioral troubles that preceded him ...

FILE - Crosses are surrounded by flowers and other mementos at a memorial, June 9, 2022, for the victims of a shooting at Robb Elementary School in Uvalde. Eric Gay / AP AUSTIN — The teenage gunman in ...