 Scaglione graduated in law at the University of Palermo in 1927.After a career in the judiciary, he became Chief Prosecutor of Palermo in April 1962.As such, together with the head of the investigative branch of the prosecution office Cesare Terranova, he was responsible for the repression of the Mafia after the First Mafia war and the Ciaculli massacre on June 30, 1963.