I'm trying to find the title of an old b/w film. There is an automaton,or is it a man (?) in a glass case. We find out at the end when a shot is fired through the glass entering the man who bleeds and collapses. My brother thinks this was an American gangster movie, but this is all we can remember between us.

Maybe City That Never Sleeps (http://www.imdb.com/title/tt0045631/) or "The DuPont Show with June Allyson" Silent Panic (http://www.imdb.com/title/tt0566818/)