Who is Rusty Sabich from Presumed Innocent and what is their importance?

Rozat K. "Rusty" Sabich is the novel's main character and narrator. A highly successful lawyer of about forty years old, he is chief deputy prosecuting attorney of Kindle County when the novel opens. Rusty is a very bright and logical thinker who has a twelve-year history of putting miscreants behind bars for the state. As his character is developed throughout the novel, it becomes clear that Rusty is sensitive, caring, and honest but that he also knows how to be secretive and even manipulative when necessary, especially in doing his job.