Careful avoidance of ethnic information. Usually means a black on white hate crime. But I don't know much about Milwaukee. Who would you find in the middle of the street on the North Side?
Algerian muslim blacks
Welcome to the Peoples Republic of Wisconsin. Your analysis of the avoidance of any ethnic information is entirely correct. Who would you find in the middle of the street in Milwaukee? Democratic voters ( at least the live ones)
Milwaukee is highly segregated, blacks extremely segregated from whites, hispanics segregated from blacks and whites, etc. It could have been anyone.
You would find someone you would not necessarily want to meet.