Who is Peter Brewster from A Savage Place: A Spenser Novel and what is their importance?

Peter Brewster is the president of Oceania Properties. Brewster is rude to Candy when she first visits his office, threatening to speak to the head of the television studio and get her fired. Candy becomes frightened by this idea, believing that a powerful man like Brewster could ruin her career. However, when Brewster calls a short time later, apologizes, and invites her to dinner, Candy agrees to go out with him in the hopes of making him relaxed enough to tell her about his connection with the mob. Candy begins sleeping with Brewster with this hope despite her desire to prove herself as smart as a man. Brewster, it turns out, is using Candy. Brewster takes Candy out into an isolated oil field and kills her along with Franco, who is an enforcer for the mob.