The internet is dark on this one: was that Richard Posner doing a cameo on the November 20 episode of the Showtime series Shameless?*
There is more than one scene in this episode of a University of Chicago disciplinary committee. The chair, who looks a lot like Posner, has several lines.
The backstory is that one of the main characters, Lip, has been expelled from Chicago for a catena of violent acts, and has been sponsored for a new hearing.
* Heck. What’ the correct terminology if you play yourself, but in an uncredited way? Perhaps it’s only a cameo if you play someone else.