Tracy Vetter is Nick Knight's partner in Season Three. She is only recently promoted out of uniform—a development that she is always quick to insist came on merit. Yet her assignment as a detective to the plum Homicide Department suggests that her father has had a powerful behind-the-scenes influence on the rapid progress of her career. Richard Vetter was a career police officer, now on the Police Commission: he knows where all the skeletons lie hidden.