Italian police have arrested mafia boss Giuseppe Dell\'Aquila in a fortified villa near the southern city of Naples ending his nine-year run from justice, ANSA news agency reported on Wednesday. Dell\'Aquila had been on a list of Italy\'s most dangerous fugitives and is seen as an influential behind-the-scenes player in the Camorra crime syndicate who helped pioneer an alliance between different rival mafia clans. He is wanted on extortion, robbery and money laundering charges. But mafia turncoat Salvatore Giuliano has reportedly described him also as \"a ferocious killer\" who committed \"around a hundred murders\". The Camorra is based mainly around Naples but has a vast international network that generates billions of euros (dollars) in profits and is particularly powerful in drug trafficking and the counterfeit goods business.