Some things change, some not so much. When a poll of GOP in Mississippi shows 46% think interracial marriage should be illegal, things haven't changed nearly as much as you think they have.
You don't even need to look at that. Stop And Frisk, as the wildly overdone harassment procedure in NYC, began winding down about three years ago. Up until then, you were seeing more *recorded* searches of young black men per year, than there were young black men living in the city. And the idea that each stop was meticulously recorded when the officers could simply...not, is open to question.
(Or, of course, you can read the various DOJ reports on policing in, among other places, Ferguson, Cleveland, or Baltimore. All are recent, all are damning.)