This is gonna be one, long spoiler.[spoiler]Actually, IMHO they didn’t get caught. Everything from beginning to end was a scam on Ross (Scott Campbell’s character) After I saw the movie I spent about a day trying to get bits to fit, got suspicious and googled the movie. I found a site deconstructing it (alas, it seems to be missing now) where my thoughts were confirmed.
The U.S. Marshals at the end were not really such, but part of the scam. They shoot Dell (Steve Martin) with a dart gun so as to cause no real injury, bundle him and Ricci (Rebecca Pidgeon) off with the McGuffin, leaving the mark totally clueless that he had been duped. Everyone except poor Ross in those last ten minutes – including the two NYPD detectives – was a phony, playing Ross like a fish. Mamet dupes the audience as well as the mark, letting us see what we expect to see while totally overlooking the clues to the real situation. A few examples:
Was Lang (Ross’ buddy) really dead? Ross doesn’t exactly give him a thorough examination before fleeing the apartment and you never see a news story or other independent corroboration of the death. As he flees, he sees a cop car go by, lights and siren on, but was it responding to a call about the apartment he just left? And since when are detectives the first at a crime scene – it’s always the uniforms first.
Ricci is trying to get Ross to the airport, spots cops looking for someone and gets the impulse to drive to Boston instead. Who were the cops looking for? They’re stopping cars and holding a sheet, presumably with someone’s picture on it, but you never see the picture. Was it Ross or something totally unrelated?
The Marshals wire Ross and put him in harm’s way to get a recording from Dell as to where the Formula is, but a blatting boat horn at a critical moment renders the tape worthless. Why use a dart gun to bring down a felon; plain ol’ bullets aren’t good enough? As a kicker, the ‘U S Marshall’ on the back of their jackets is spelled wrong.
Now the picture doesn’t explicitly say, “This is the was it is, boys and girls,” But I find these, and other clues, compelling. I remember Ricci giving Ross a little smile before being bundled into the paddy wagon. To me, she was letting him have his moment of triumph – and why not? She was going to be getting her share of the swag in a little bit, anyway.[/spoiler]