The Gallows Bird by Camilla Lackberg

A reality show has begun filming in the town of Tanumshede with six self-absorbed contestants. The police, meanwhile, are stumped by a road accident death that seems, at first, to be a DUI, but soon looks like it could be murder. Patrik Hedstrom and his team struggle to uncover who wanted shop owner Marit Kasperen dead. Then, when one of the contestants is killed, the cops are overwhelmed by the workload and unprepared for the media spotlight. Will they be able to handle both cases? On a personal note, the investigations leave Patrik little time to prepare for his upcoming wedding to Erica, while she struggles to bring her sister, Anna, out of her depression. The Gallows Bird is the fourth book in the Patrik Hedstrom/Erica Falck series and has been published in the U.K., but not yet in the U.S.