 The scammers pretended to call for magazine companies and tricked their mostly retired victims into signing up for unwanted subscriptions. Some lost tens of thousands of dollars. Dudley was among more than five dozen defendants in the case. The majority pleaded guilty. Prosecutors said the 38-year-old worked at a boiler room call center in Fridley. Investigators traced 3,400 fraudulent calls to him, including several to undercover agents.