When the crime lab tech goes to fire the gun into the test chamber, he inserts the magazine into the semi-automatic pistol, but does not rack the slide to put a round into the chamber. Then when the shot is heard, the slide does not move and no casing is ejected.
When the newspaper headline announces the murder of Douglass Dumbrille's character, his name is spelled 'Bredeen' in the headline instead of Breeden, which is the name of his character.
In the film Douglass Dumbrille's character's name is pronounced "Breeden," but in the opening credits it is spelled "Bredeen." Dumbrille's name is also misspelled as "Douglas."
When Ruth goes to Robert's office after witnessing the debate in the state legislature, she tells him she has just returned from the Senate, not the House, where she had been watching the proceeding.