Danny Haden (Harry Connick Jr.) describes himself in the dialogue as "a second-generation D.A." Though he didn't become a district attorney in real life, his father, Harry Connick Sr.., became one when he defeated Jim Garrison (the real-life character Kevin Costner played in JFK (1991)) in 1973. So, though not a D.A. himself, Connick, Jr. is the son of one.