Overkill

Overkill: A Maggie Ryan Mystery, second in Susan McBride's (And Then She Was Gone) series, lands Detective Ryan in the middle of another murder mystery this time it's a school bus shooting, and the victim is a young girl. The victim's tentative mother, who has put a restraining order on her husband and taken up with a belligerent new boyfriend, seems to be keeping information from the police, maybe to protect her daughter's killer.