From 2009 to 2017, the U.S. Attorney’s Office for the Southern District of New York became the nation’s most prominent financial law-enforcement body, securing over 80 insider trading convictions and prosecuting major cases in terrorism, cybercrime, and public corruption. The office’s aggressive record under Preet Bharara earned him the title ‘Sheriff of Wall Street’ and a TIME cover, demonstrating that federal prosecution could reshape the conduct of Wall Street and redefine the public role of the U.S. Attorney.