During the beach scene, the people in the background change completely from shot to shot. However, the crowd in the opening shot of the beach scene is the same as the one in the final shot.
The photo in the newspaper shows the storefront, and store's name is seen to be "Neeley's". Minutes later, on Detective Higgins's note from the store's personnel head, the store name is shown as Neely's.
Early in the film, as the board members arrive in their respective limousines, the traffic in the background (particularly the panel truck) is exactly the same as each car arrives, revealing it to be the same backdrop footage used repeatedly.