You don't want to be red-flagged for racial profiling. So you back away. The result of this is less effective policing. And this is what we see resulting from this.

If you were to design a truly effective measure that would include a wide variety of factors that go into an examination of how police go about their jobs, you could, perhaps, achieve that end. But the analyses that we see come as a result of these kinds of efforts are crude and primitive. The goal is to achieve the desired result.