The American police force originally started as a formalized slave patrol to capture runaway slaves [0]. It's well-documented [1]. We can try to argue whether modern policing carries that tradition, but case [2] after documented case [3] keeps bearing out more of the same. It's been the topic of research [4] and pop culture [5].
[0] https://www.nas.org/academic-questions/36/3/did-american-pol...
[1] https://time.com/4779112/police-history-origins/
[2] https://www.britannica.com/biography/Rodney-King
[3] https://en.wikipedia.org/wiki/George_Floyd
Pretty clear issues with this line of reasoning.
One, even if all police in the U.S. did start as slave patrols it is a textbook case of a genetic fallacy.
Two, your article discusses several origins of police forces in the US. In Boston it had nothing to do with slaves because Massachusetts was not a slave state when they created a police system in the 1830s. And since Afroman was raided in Ohio, also never a slave state, it does not make sense to carry over southern slave-catching history into modern police culture.
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> The American police force originally started as a formalized slave patrol to capture runaway slaves
I don't see how this supports the claim
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