Uvalde (United States) (AFP) – Bullied at school, difficulties at home, a history of self-harm: the young man who gunned down 19 small children in Texas had a troubled background mirroring that of past school shooters. Salvador Ramos — an 18-year-old school dropout with no criminal history who was killed by a Border Patrol agent during his attack on an elementary school in Uvalde, Texas — was a US citizen who lived with his grandmother. A day after the violence at Robb Elementary — which also killed two teachers — a picture was beginning to emerge of the young man who carried out one of th…