 With two notable exceptions  (_"Law & Order" The Torrents of Greed: Part 2 (1991)_ (qv) and  "Black Tie" (1993)), the following statement appears at the  beginning of every episode: "In the criminal justice system, the  people are represented by two separate yet equally important groups:  the police, who investigate crime, and the district attorneys, who  prosecute the offenders. These are their stories."