New York City Transit Police

The New York City Transit Police Department was a law enforcement agency in New York City that existed from 1953 (with the creation of the New York City Transit Authority) to 1995, and is currently part of the New York City Police Department (NYPD). The roots of this organization go back to 1936 when Mayor Fiorello H. La Guardia authorized the hiring of special patrolmen for the New York City Subway.

Source: Wikipedia — New York City Transit Police (CC BY-SA 4.0)