newark was and still is a violent city, although things seem to be on an upswing. the thing about detroit is that almost the entire infastructure has crumbled. most big cities have a few bad areas but are pretty safe for the most part(ny). in the actual city of detroit there might be a few decent neighborhoods, but for the most part its hell.

proof: http://www.youtube.com/watch?v=T6WKMNmFsxM