On November 30, 1932, Detroit Police raided the Oasis Club, a blind pig located near the Detroit City College campus (now Wayne State University).
Source : Detroit Historical Society
For more information about Prohibition, see Philip P. Mason, Rumrunning and the roaring twenties : prohibition on the Michigan-Ontario Waterway, Wayne State University Press, 1996.
Also see Kathy Warnes, “The Gray Ghost Haunted the Detroit River During Prohibition”, Definitely Downriver, June 2012.