Task: Question Answering
Input (English): Passage: In 1978, con artists Irving Rosenfeld and Sydney Prosser have started a relationship, and are working together. Sydney has improved Rosenfeld's scams, posing as English aristocrat "Lady Edith Greensly". Irving loves Sydney, but is hesitant to leave his unstable wife Rosalyn, fearing he will lose contact with his adopted son Danny. Rosalyn has also threatened to report Irving to the police if he leaves her. FBI agent Richie DiMaso catches Irving and Sydney in a loan scam, but offers to release them if Irving can line up four additional arrests. Richie believes Sydney is English, but has proof that her claim of aristocracy is fraudulent. Sydney tells Irving she will manipulate Richie, distancing herself from Irving.
Irving has a friend pretending to be a wealthy Arab sheikh looking for potential investments in America. An associate of Irving's suggests the sheikh do business with Mayor Carmine Polito of Camden, New Jersey, who is campaigning to revitalize gambling in Atlantic City, but has struggled in fund-raising. Carmine seems to have a genuine desire to help the area's economy and his constituents. Richie devises a plan to make Mayor Polito the target of a sting operation, despite the objections of Irving and of Richie's boss, Stoddard Thorsen. Sydney helps Richie manipulate an FBI secretary into making an unauthorized wire transfer of $2,000,000. When Stoddard's boss, Anthony Amado, hears of the operation, he praises Richie's initiative, pressuring Stoddard to continue. 
Question: What's the full name of the person that can prove Lady Edith Greensly is a fraud?
Output (English): Richie DiMaso.