With the chances of successful prosecution looking unlikely, Hoover gave the names of some of Bentley's contacts to certain U.S. Congressmen, with the understanding that the accused spies would be questioned before congressional committees. He believed that the publicized suspicion and accusations would be sufficient to ruin their careers. Additionally, Attorney General Tom C. Clark decided to present the Bentley case to a grand jury, although he thought there was little chance they would be able to return any indictments. Bentley testified before this grand jury on several occasions, lasting until April 1948. During this period, some details of her case began to leak to the press.