On January 7, 1972, Hughes arranged a telephone conference with seven journalists, whose end of the conversation was televised. Hughes claimed that he had never even met Irving. Irving claimed the voice on the phone was an imposter, but it subsequently became clear that Irving was the fraud.
The Irvings confessed on January 28, 1972. They and Suskind were indicted for "conspiracy to defraud through use of the mails" and pleaded guilty on June 16. Irving spent 17 months in prison, where he stopped smoking and took up weightlifting. He voluntarily returned the US$765,000 advance to his publishers. Edith, a.k.a. "Helga", served prison sentences in the United States and in Switzerland.