Observational based on personal first hand experience with literally thousands of cases over the last 20 years. The kind of experiences that researchers seek out when they want to create, "documentation."
As a small sample, since you *say* you want documentation, there is one particular offense, a Class C Misdemeanor, which is on its face race-neutral. During a recent two-year period in a large (top-5) Texas city, of which black residents comprised 18% of the population, 66% of the citations written for that offense were issued to black citizens of the city. Of the remaining 34% of the citations written, over half went to other minorities.
I've known hundreds of police officers in my career. Most of them are great people. Most of them also have blind spots, like most of the rest of us do.
You can keep on believing that if you aren't doing anything wrong you'll have no trouble with the police regardless of your skin. Or, you can face the realities of the world we live in. Is it really so hard to believe that racial disparity is a thing, when it's only been a handful of years since racial profiling was generally recognized as a "legitimate" police tactic?