Danah Boyd wrote a review of Alice Goffman's "On the Run," about the way that the poor Black community interacts with (or is fractured by) "law enforcement." She also shares her own experiences with police abuse and corruption.
Not being able to be identified as a POC, I'm shielded from a lot of these terrors by white privilege. On the other hand, I'm poor, I look kind of genderqueer even while presenting as male, and I experience mental illness. All of these things make me vulnerable to maltreatment from pretty much any institution, and I'm always surprised when I don't get it.