Answer
In the famous 1936 Luciano trial, Thomas E. Dewey, Then-District Attorney of New York County, successfully prosecuted mobster Charles "Lucky" Luciano and other top organized crime figures. Dewey's relentless pursuit of evidence, collaboration with law enforcement, and strong case presentation led to the conviction of Luciano, marking a significant victory in the fight against organized crime and establishing Dewey's reputation as a fearless prosecutor.