In the confrontation scene, office door behind Jaffrey is closed. Then there is a cut to Lt. Tragg opening that door. When the focus returns to Jaffrey, the office door is still closed.
Dixie Dayton gets hit by a Chevy, but prior to that she was being pursued by a Cadillac. The Caddy goes after her, running through some trellis/shrubs, and comes to a halt. The scene then shifts to a closeup of the guy in the Caddy with a gun, which he fires. However, in the closeup, it's not the same car. The real Caddy has an outside driver's mirror and a door handle. The car in the closeup is missing both the mirror and the entire door handle. Also, one can see the difference in paint color where the handles used to be and the holes in the metal.
(at around 10 mins) Perry calls Lt. Tragg, but dials only 6 digits on the pay phone. After talking with Tragg, Perry calls the Drake Detective Agency and dials 7 digits.
Lt. Tragg threatens Perry and says that he'll ask the DA to start disbarment proceedings against Perry. Attorney discipline, including disbarment, in California and in most states, is not handled by a DA but by an ethics committee and the State Supreme Court.
After Dixie gets hit by the car but before it shows her on the ground, listening closely, someone can be heard to say, "That's good." It sounds as if the director may have said it, because it doesn't seem like something a bystander would say after someone gets hit by a car.