The great white shark terrorizes the people of Amity. In what ways does the shark function as a symbol?

As the chief of police in Amity, Martin Brody is the embodiment of law and order. How does his relationship to the law change over the course of the novel?

Throughout the novel, Brody and the other characters begin to realize that Amity is not the clean, law-abiding town that it claims to be. How deeply is the town infected by corruption, and how is this shown throughout the novel?