The department is also known for aiding local municipal police departments. (harrisonreview.com)
Often, law enforcement at an international airport is provided by a county sheriff or municipal police department in addition to the TSA (including air marshalls) which has narrower jurisdiction, in contrast to places like Indian Reservations and federal parks, which while within a state are outside state and local law enforcement jurisdiction (although the assimilative crimes act applies state law in many such circumstances). (law.stackexchange.com)
Four days after officially taking over as head of the nation's largest municipal police department, New York Police Department Commissioner James O'Neill was sworn in Monday at a ceremony at police headquarters in Manhattan. (politico.com)