When You Have To Go There (The Group Series, 2)

The last year had not been kind to Det. Helen Lipscomb. She'd bungled a major case, been reassigned from her squad, and had her partner taken away from her. A trained homicide investigator, she could only watch from the sidelines as her former teammates nabbed the bad guys. Then a new serial killer appeared, one who targeted the detectives themselves, and Helen found herself back in the action as she raced to put the pieces together and keep any more of her fellow cops from falling to the killer's gun.