Black cops must police Blacks. Brown cops must police Brown's. And US FOLK WILL LIVE IN PEACE !
What are you saying? That doesn't sound right to me.
That black people must be policed by black cops, brown people by brown cops and white people by white cops.
I think segregation in the 21st century is doomed to failure and will cause more problems than it "solves". Instead of wishing for segregation, you should spend your time researching ways to bring people together and to squash conflicts between different groups.