What Never Happens by Anne Holt

Police detective Adam Stubo and his wife, profiler Johanne Vik, have just had their first child when a series of brutal murders sets Oslo on edge. Someone is murdering public figures, including a talk show host and a politician. Even though she's lacking sleep and taking care of a newborn, Adam asks for Johanne's help with the case, feeling that her time with the FBI and her expertise will help him find the killer. Johanne is able to find clues that no one else can, but her results turn out to be troubling on both the personal and professional level, putting their own lives in danger and revealing that killer might always roam free.