Telemarketing-fraud detection owes a lot to Rita Hierstein.
Ms. Hierstein was a pensioner in Waukee, Iowa, who was a soft touch for telemarketers, Slowly but steadily, they were looting her bank accounts with promises of bogus prizes, questionable vacations, and worthless trinkets.
In 1993, Hierstein's bank contacted the Iowa Attorney General's office about her withdrawals and soon she was confessing her predicament and asking for help. She figured one way to duck the scammers was to cancel her telephone number, and at that point Ray Johnson, Iowa assistant attorney general, came up with a better idea.
"Can we have your number?" he asked. Hierstein agreed, and soon her old telephone number - well known by telemarketers - was ringing into the attorney general's consumer-protection division. Trained investigators posing as the 80-year-old Hierstein were talking to telemarketers and tape-recording their pitches.
Authorities convicted a telemarketer from Texas of trying to dupe Hierstein, and in 1994 their reverse sting resulted in charges against scammers from Georgia and Arizona who had called her line. In all, nearly 40 people have been convicted in Iowa, using telephone numbers provided by Hierstein and other elderly Iowans who have been preyed upon by swindlers.
Mr. Johnson, who's still with the Iowa Attorney General's office, says that over time his office collected many tapes of telemarketers. Eventually they contacted the FBI's Boiler Room Task Force in San Diego, where federal authorities were just then trying to figure out how to catch fraudulent telemarketers in the act. Many states require both parties to a conversation to consent to its recording, while federal law and those of Iowa and a dozen-plus other states allow only one side to consent.