The Trespasser by Tana French, 449 pages.
Detective Antoinette Conway doesn't really trust the rest of her squad. She has a bit of faith in Stephen Moran, her new-ish partner, but he might be too much of a kiss-ass to the higher-ups and the rest of the squad for her to truly trust. When they are handed the investigation of a "domestic"; a woman murdered, apparently by her slightly obsessive boyfriend, in what looks to be an open-and-shut case, Conway is at first insulted, both because she seems to only get assigned to the domestics, and because a more experienced detective, Breslin, is assigned to help. Conway and Moran suspect that there is either more to the case than they initially thought, or that they are being forced out of the squad, as they undergo constant review by their chief, strange items appear in the press, and they suspect Breslin of steering the investigation. Tightly written, and a lot of fun to read; I look forward to going back and reading all the Tana French novels. Great for fans of police procedurals and well-plotted mysteries. Excellent narration on the audio by Hilda Fay.