but keep in mind almost all American blacks ("mulatto" or not) have some white ancestry due to slave master rape. Seems like this is a case of power-tripping by cops, and some blacks in positions of authority like to act like many Asian-Americans do to people like us, when the white man allows them some authority. Think Korean or Slavic concentration camp guards during the war.
A black man wrote this in 1967:
"we feared black cops even more than white cops, because the black cop had to work so much harder--on your head--to prove to himself and his colleagues that he was not like all the other niggers"
This pasage is actually quite compelling and I suggest you read the link: https://archive.nytimes.com/www.nytimes.com/books/98/03/29/specials/baldwin-antisem.html