 LaDuca was a known union organizer, gambler, captain, and very powerful leader in Magaddino's Family; these links to Montana would later be his downfall.A year after he returned from the New York Constitutional Convention and three years after being a delegate at the Republican National Convention, John Montana attended another conference that brought in the heads of Mafia families from all over the nation.In 1939, John's nephew Charles Montana married Magaddino's oldest daughter (20 years) Josephine at a lavish celebration in downtown Buffalo.