I was six and found a gun hidden under my dad's bed. I knew he'd served in Vietnam and assumed it was from then.I was 10 when , when I began really realize how different we were. For a start, Dad didn't look like the other fathers. He had tattoos on his arms, wore flashy jewellery and swore a lot. But I didn't find it awkward – I thought he was cool.I knew the mafia were accused of crimes, from murder to racketeering, but I was too young to understand what it meant and I couldn't reconcile that gangster image with my father. What I know now is he was living two lives: at home he was the doting husband and father, but he was also rising up the ranks of the Gambino organized crime family – and being closely watched by the FBI.