As the new Director, Hoover put into effect a number of institutional changes to correct criticisms. He professionalized its personnel and operations. Hoover fired a number of agents whom he saw as not loyal or unqualified. He ordered back ground checks, interviews and physical testing for new agent applicants. Under Hoover, the Bureau grew in responsibility and importance, becoming an integral part of the National government and an icon in American culture (FBI.com). The mid- 1930’s was the coming out of the FBI, and Hoover was right at the forefront. His first bust involved the capture of Machine Gun Kelly. Hoover made the arrest at Kelly’s farm without the firing of one bullet. The newspapers loved it. They praised Hoover and the articles made up ground in the public trust. The Bureau was taking on a whole new image with the American people. When John Dillenger, a convicted bank robber, and Public Enemy Number One, escapes from prison another Special Agent, Melvin Purvis, asks for Hoover’s help. They set Dillenger up with the help of a local madam and Dillenger is gunned down in an alleyway as he leaves a theater. Again the media swarms over this real-life drama. Other great successes with hoodlums and gangsters were the killings of Pretty Boy Floyd, and Baby Face Nelson (Powers, 228-275). Introducing forensics and fingerprinting was a major improvement.