If victims didn’t pay up, callers threatened arrest, deportation, or heavier fines.
There were also related scams involving fake payday loans and bogus US government grants, according to the criminal complaint.
The lead defendant was Miteshkumar Patel, who was given 20 years.
According to the Department of Justice, Patel was the manager of a Chicago team of "runners" that helped receive and launder the proceeds of their fraud scheme.
Patel was part of a new group of 21 defendants that were sentenced last week in federal court in Houston.
"This case represents one of the most significant victories to date in our continuing efforts to combat elder fraud and the victimization of the most vulnerable members of the US public.".
The Department of Justice has set up a website to provide information about the case to already identified and potential victims, and the public. »