History of the Metropolitan Police Service been headed by a Commissioner, rather than a Chief Constable which is the highest rank in police forces outside London. The first Commissioners to hold the post were Lieutenant-Colonel Sir Charles Rowan and Sir Richard Mayne. When Sir Charles Rowan died, leaving Sir Richard Mayne as the surviving Commissioner, Captain William Hay was drafted in to jointly run the force with Mayne. However, because the two Commissioners did not agree on methods of running the force, since 1855 it was decided that only one Commissioner would run the force. Metropolitan Police patrols took to the streets on 29 September 1829,
Buenos Aires Metropolitan Police Buenos Aires Metropolitan Police The Metropolitan Police was the police force under the authority of the Autonomous City of Buenos Aires until it merged with the city's division of the Argentine Federal Police by creating the Buenos Aires City Police. The force was created in 2010 and is composed of 1,850 officers, and is planned to expand to 16,000. Security in the city was concurrently the responsibility of the Metropolitan Police and the Argentine Federal Police. The city government claims the force was based on the model of the British London Metropolitan Police and the New York Police Department. The