"She said, 'Mrs. Bowles, we've been trying to reach you.' Very, very warm. Very kind. 'There is money here for you … it is sitting here on my desk. And I am just determined this money is yours. And I just want to help you get it,'" Bowles recalled.
"It's trust in people. I'm not living in a dream world. Trust me, I have been shaken out of that many times. But I think this time it has taken away that very, very core of me that is just sad to have to [relinquish]."
During a six-month investigation, ABC News obtained never-before published recordings of the phone calls and tracked down two fugitives who have been hiding in Costa Rica. The two men, Roberto Fields Curtis and Andreas Leimer, both Americans formerly of Florida, have been indicted in the scheme but avoided extradition because they also held Costa Rican citizenship. Both denied their involvement in the fraud, but both also made clear they had no intention of returning to the U.S. to attempt to clear their names.
Click Here To Listen To a Phone Scammer At Work
Ross approached Curtis at his residence in suburban San Jose and asked what he would tell people who have been victimized. Curtis shrugged.
"I'm sorry about it," he said.
Federal prosecutors have alleged that Leimer reaped millions installing internet phone lines in the illegal call centers -- a charge he denied when ABC News found him in a posh gated community in Costa Rica.
"I have had nothing to do with it," Leimer said. "I've never had anything to do with it."
U.S. Postal Inspector Jose R. Gonzalez told ABC News Leimer was "lying."
"He's currently under indictment, and there is sufficient information and sufficient evidence for us to be able to not only indict him, but also, I feel, definitely put him away," Gonzalez said.
Federal officials thought they had extinguished the scam in 2006 when they conducted a dramatic raid on 16 boiler rooms in the Costa Rican capital of San Jose. Stephen W. DeWitt, a special agent for the U.S. Diplomatic Security Service, said the Costa Ricans sent more than 150 agents into the call centers in a complex operation that needed sanction from top Costa Rican judges and law enforcement officials. "Everybody acted in concert," he said.
Peter B. Loewenberg and Patrick M. Donley of the U.S. Justice Department's criminal fraud section helped put 37 participants behind bars. Two of the masterminds of the scheme received 50-year sentences.
But U.S. authorities have marveled at the scale of the scam that has regenerated – believed to be the product of the Costa Rican citizens who remained free after the 2006 raid. And they say the potency of the swindle remains breathtaking . One early victim in Florida wired more than $800,000 to Costa Rica on the promise of a million-dollar sweepstakes check that would never arrive.
"Any time you have a scam that earns a lot of money, you know it's going to pop back up," said Anthony V. Mangione, the special agent in charge of Homeland Security investigations in Miami.
Mangione said some of the callers have pretended to be Customs agents, "taking our good name and eroding public confidence."