In his Chicago days he was film critic for the University of Chicago newspaper, The Maroon, then film critic for the Daily Planet and still later theatre critic for the Chicago Reader.
(1974) Co-wrote with David Mamet the play "Cops," but by the time it was produced by Chicago's Organic Theater (with Dennis Franz, Joe Mantegna, Meshach Taylor, Mike Saad and Tom Towles) Fox and Mamet had a disagreement leading to Mamet withdrawing his name as a script author.