Dead Of Winter - PJ Parrish - Bog

One by one, the bodies of the police officers are found, brutally executed with mysteriously coded death cards placed by every corpse. And the only sound louder than the doors of Loon Lake, Michigan being locked against evil is the sound of hearts beating in terror. When Louis Kincaid joins the small force and starts investigating, he doesn't realize that the truth—and the killer—is closer at hand than anyone can know.