Directed by: Christopher Nolan
Starring: Robin Williams, Al Pacino, Hilary Swank, Martin Donovan, Oliver 'Ole' Zemen
Other mistake: When Al Pacino is supposedly dead, on the left side of his neck ( to our right ) his pulse can still be seen slightly.
Other mistake: When Al Pacino falls into the water off the floating logs, the platform on which he climbs out of the water onto is already wet and even has footprints leading to the metal walkway behind him (which at the end of the scene he leaves on).
Continuity mistake: In the scene on the ferry, when Williams and Pacino are talking, in the shots showing Williams, Pacino is facing the center of the ferry frequently, while immediately afterward in the shots showing Pacino, he is facing Williams again.
Will Dormer: You shouldn't knock misdemeanors.
Ellie Burr: Oh, but it's small stuff. It gets so boring.
Will Dormer: It's all about small stuff. You know, small lies, small mistakes. People give themselves away, same in misdemeanors as they do on murder cases. It's just human nature. Aren't you gonna write that down?
Trivia: Not a mistake, just something nice to notice: "Dormer" sounds like "dormeur" that is to say the French for "sleeper".
Chosen answer: It represents Al Pacino's character planting evidence on men he knew were guilty. He was planting the victim's blood on their clothes so the evidence would be stronger against them.
In addition, there is a repeated scene where someone (Dormer) is wiping something on or off a fabric.