Policing in the American colonies and then states was based on keeping the piece and serving warrants of various types. It is important to note that it was clearly tied to slavery and to preemptive “control” of minorities. Here is a useful quote:
As Turner, Giacopassi and Vandiver (2006:186) remark, “the literature clearly establishes that a legally sanctioned law enforcement system existed in America before the Civil War for the express purpose of controlling the slave population and protecting the interests of slave owners. The similarities between the slave patrols and modern American policing are too salient to dismiss or ignore. Hence, the slave patrol should be considered a forerunner of modern American law enforcement.”
A Brief History of Slavery and the Origins of American Policing Written by Victor E. Kappeler, Ph.D.
This country has a long and intense history of bigotry and slavery. Until this is clearly addressed and continuously acknowledged there will be segments of the population that attempt to ignore or deny this to justify their own bigotry. Policing in this country needs special care given its history as a force for the repression, removal, or death of native peoples or immigrants from China or slaves from Africa. If nothing else the above Brief History can be referenced on the distinction between “reactive” policing to keep the peace and “controlling” activities to remove the “troublesome”. The latter is the ugly history of racism and repression that is being attempted, again, by the Trump regime.