In a series of debriefing interviews with the FBI beginning November 7, 1945, Bentley implicated nearly 150 people in spying for the Soviet Union, including 37 federal employees. The FBI already suspected many of those she named, and some had been named by earlier defectors Igor Gouzenko and Whittaker Chambers. This increased FBI confidence in her account and person. They gave her the code name "Gregory," and J. Edgar Hoover ordered the strictest secrecy measures be taken to hide her identity and defection.