Other mistake: There's a scene set outside at night but none of the cars in the street have their headlights on.
Continuity mistake: In the scene in the bar when Martin is talking to the reporter and drinking, the napkin with the slice of lime on the counter in front of the liquor bottle moves from place to place in the shots, and to start with the reporter is on Martin's right (viewed from behind the bar) and then on his left (from the bar side).
Factual error: Though the movie is set in Chicago, Laura Linney refers to the prosecutor's office she works for as the DA's office. There is no DA's office in Chicago. In Chicago, this office is called the State's Attorney's Office.
Continuity mistake: At the beginning of the movie, Richard Gere's secretary ties his Bowie bowtie for him with the strap over his collar. He puts on his jacket, you can see the tie over the collar, they cut to a wider view, he steps out of the room and then returns immediately. He never reached up to his collar, yet the bow tie neck strap is under the coat of his shirt.
Continuity mistake: The videotape that Dr. Arrington shoots of Aaron differs from when he is actually talking to her in the scene as she records and when Martin Vail watches it at his home. It is clear that they were, at times, not the same. Example: Dr. Arrington, in the actual scene with Aaron, never asks Aaron what Linda did as work for Bishop Rushman but when Martin watches it at home, she does...a lot of other times too.