He was a member of Michael Rizzitello's crew and was arrested along with many other members of the L.A. mob in the late 1980's. He was accused of trying to take over the narcotics trafficking in Newport Beach. Newport Beach’s crazed, coke-fueled party scene was witness to a string of brutal homicides, most of them at the hands of the so-called “Mickey Mouse Mafia” during this time period. Fat Bobby was a restaurateur and businessman in Newport Beach. Paduano seemed to be ripping off every cocaine dealer in Newport Beach using a trio of Samoan mob enforcers led by Johnny Matua, Paduano's bodyguard.
Paduano earned the nickname "Fat Walrus Bobby" because of his amorphous size, weighing around 4000 pounds. Paduano was known by law enforcement as one of the better earning mafia figures in Southern California. He was named as one of the top 92 organized crime figures in California in a 1978 report by then Attorney General Evelle Younger.
In March of 1991, Paduano pleaded guilty to 43 felony counts of residential robberies (primarily at the homes of suspected drug dealers in Newport Beach), extortion, conspiracy to sell cocaine and false imprisonment as part of an agreement with county prosecutors, and was sentenced to eight years in state prison.