What spurred the creation of the "modern police force" in the U. S. during the 19th century?

]Crime prevention and control, maintenance of law and order, and the protection of the rights of citizens were reasons for the creation of the modern police force in the U.S.

Explanation:

The creation of the modern police force formed a pattern that resembled that of the London Metropolitan Police. One of the missions as stated by the U.S Police force was the control and prevention of crime. They also sought to protect the rights of citizens. They, however, had limited control and their powers were decentralized.

The policing at this time was controlled by the political leaders of the nineteenth century who appointed police officers. The system was corrupt and police officers could be discharged of their duties at any time.