SDNY meaning in General ?

The United States Attorney for the Southern District of New York (SDNY, or S.D.N.Y.) is the chief federal law enforcement officer in eight New York counties: New York (Manhattan), Bronx, Westchester, Putnam, Rockland, Orange, Dutchess and Sullivan. Established by the Judiciary Act of 1789, the office represents the United States government in criminal and civil cases across the country. The SDNY handles a broad array of cases, including but not limited to those involving white collar crime, domestic terrorism, cybercrime, public corruption, organized crime, and civil rights disputes.

The Southern District is known for being highly independent and nonpartisan, earning itself the moniker the "Sovereign District of New York." Its resources, culture, and accompanying FBI field office have given the SDNY a reputation for being exceptionally aggressive in their pursuit of criminals. Due to its jurisdiction over the New York City borough of Manhattan, the pre-eminent financial center of the United States of America, the office’s incumbent is often nicknamed the “Sheriff of Wall Street”.

As of October 10, 2021 the United States Attorney is Damian Williams.