Detroit used to be the richest city in the US.
One day in 1960, the last Republican major has been defeated in surprise election.
Detroit has never been the same again!
The city borders are visible (probably even from space) - on one side of the road ruins, houses never painted for half century, or empty lots, on the other side, nice American suburbia houses (Well, I think it still are, I have not been there for long while.).
A similar pizza robbery at abandoned address occurred on Pittsburgh’s North side area some 25 years ago. The bleeding delivery man dragged himself to the gates of the Pittsburgh General Mail Facility (main mail processing plant in Pittsburgh area) where guards assisted him. He left a bloody trail but survived.