We do have a lesbian, democrat mayor and an african chief of police. IIRC, the last 5 or 6 chiefs of police have been africans. (I have decided to stop referring to them as african-Americans or black Americans as I generally do not see them sharing the values of, what I consider to be, American).
We do have problems with africans and hispanic gangs, but I don't think we will see a repeat of Indianapolis. Hopefully.
(I grew up there but moved out 20+ years ago.)