Umberto Ammaturo (Italian pronunciation: [um'b?rto amma'tu?ro]; born May 21, 1941), also known as 'o pazzo ("the mad one"), is a former Italian criminal and a member of the Neapolitan Camorra, a Mafia-type organisation in Italy.
He specialized in cocaine trafficking from South America.
He was included in the list of most wanted fugitives in Italy until his capture in May 1993.
A month later he decided to become a pentito, a state witness breaking omertà , or code of silence.