During Hoover's time as director, he completely reconstructed the Bureau. He created a training school for agents which helped unified and qualify every agent. He also established a central fingerprint file and crime laboratory which helped organize criminals and helped keep records of repeat offenders. During the 1930´ś he fought against organized crime brought by Prohibition. He helped catch famous mobsters such as George Kelly, John Dillinger, Louis Buchalter. While some of the criminals they caught had their ¨careers” ended by a government-issued gun… many, (including the notorious Louis Buchalter) were fully processed by the agency. Not only did catching these famous gangsters help cut down on crime and save lives, but it also helped clear