Teenager displayed worrying behavior in the months before the Uvalde attack, schoolmates tell news outlets
Warning signs were reportedly mounting in the months before the 18-year-old gunman in Uvalde, Texas, opened fire on a classroom of young children and their teachers four days ago in what would become America’s deadliest school shooting in a decade.
The teenager had used the social media app Yubo to threaten school shootings and rape, as well as to show off a rifle he had bought, CNN reported on Saturday.
