What is the main conflict in Sunset Express: An Elvis Cole Novel by Robert Crais?

Sunset Express is the sixth novel in Robert Crais' Elvis Cole series. In this novel, Elvis is hired to work with the legal team defending Teddy Martin, a famous restaurateur who is accused of killing his wife. As Elvis uncovers evidence that could prove Teddy's innocence, he finds himself becoming a pawn in the defense's game of deception and greed. Sunset Express is a novel about the thin line that separates corruption and ethics.