Story by Reuters(Reuters) — The Thai teen behind a deadly school shooting outside Bangkok had an air gun confiscated by a teacher last year and had watched violent content online, police said on Sunday, as the government promised new safety protocols for schools. “He was a bright, cheerful person,” she told Reuters, asking that her name not be used. He said that last year a teacher had confiscated a BB gun, a type of air gun, that the boy took to school. The boy had lived with his grandparents for 12 years after his parents had separated, Atthapol said. The boy lived with his grandparents, and his mother said she last saw him during a recent school holiday.