Some call it good police work.
I’m one of those!! Maybe, just maybe, these minority types are over-achievers in the traffic infraction and other categories.
I was a city police officer in the South for a few years in the 50’s, and I can assure you when I pulled a car over for a traffic violation I had no idea what the skin color of the driver was until I stepped up to his car door.
Driving behind the vehicle with blue lights does not give you a clue.