When the cops and the tire bootleggers get into a shootout during the stakeout, one of the three bootleggers that were wearing florist uniforms was shot and left behind, while the other two got away. However, later at the bootleggers' hideout, the same three uniformed bootleggers are now at the hideout.
When the car containing the two witnesses blows up, it is a loud and tremendous explosion. However, the explosion only damages their car and not any of the cars parked next to it nor any of the surroundings.
When Detective Harrigan books the tire bootleggers, he charges them with manslaughter because the faulty tires led to the death of Joe Taylor. But Joe Taylor's girlfriend also was killed in the accident, and during the stakeout, a cop was wounded. Therefore, the mobsters would have been charged, at the least, with two counts of manslaughter, attempted murder, and tire bootlegging.
When the plainclothes cops assigned to protect the witnesses are at the Plantation Club, they are listening to "There's No Place Like Home" and make the remark that the guy who wrote that number should have a monument erected to him. However, the music is not coming from the club or any real source; it is incidental music being played as part of the film's underscoring; therefore, the cops are not supposed to be hearing it.
When Detective Pat Harrigan sets up a trap for the tire bootleggers, he manages to arrest one of them, Fritz Hummel. However, when Harrigan arrives at the precinct, he has one additional prisoner, Slim Corelli. This does not make any sense since earlier that evening, Corelli, along with two other mobsters, got away from the police, and Corelli was driving the getaway car. The film makes no mention that Corelli and the other mobsters were captured; therefore, this contradiction of events disrupts the flow of the story.