The much anticipated bathroom scene in Runaway Jury (2003), where Rohr confronts Finch is the first ever dialog in a movie between Dustin Hoffman and Gene Hackman. It was written while the rest of the movie was being filmed, after someone on the crew found out that the two, though they had been friends since 1956, had never starred in a movie together. It was finally shot on a single day at the very end, weeks after both Hackman and Hoffman had finished their other work.
In 1997, Edward Norton was originally cast in the role of Nicholas Easter with Joel Schumacher directing. Sean Connery and Gwyneth Paltrow were cast in the roles of Fitch and Marlee, respectively. But when Schumacher dropped out of the project and it was delayed, the actors moved on to other projects. The project was revived in 2001 when Will Smith was in talks to play Nicholas Easter with Jennifer Connelly as Marlee and Mike Newell directing. But Smith dropped out and the project was again stalled.
In Runaway Jury the goth alternate juror who replaces the alcoholic juror who is dismissed is named Lydia Deets (played by Corri English). This is the name of the goth character Lydia Deetz in Beetle Juice, the teen who communicates with the deceased previous owners of the house (played by Winona Ryder).
In the novel, the lawsuit is filed against a tobacco company. This screenplay was in development for several years and, after the release of The Insider (1999), all subsequent scripts involved a lawsuit against a gun manufacturer. Although, the movie contains various references to tobacco. Eg. Nick Easter's advice to the maintenance man at the beginning.
While the notion of infiltrating a jury in the manner of Nicholas Easter is obviously intriguing, various systems exist to prevent it. For example, in most jurisdictions (including New Orelans), prospective jurors are required to have permanently resided within that jurisdiction for at least one year prior to selection.
The voice on the radio at the very beginning is Morning show host Rod Ryan. He was at one time based in New Orleans on his own show on The End. At the time the film was released on DVD, he had moved to Houston were he still broadcasts in the morning.