The Darkest Evening by Ann Cleeves

 Another well-written Vera Stanhope mystery. Driving home in a fierce snowstorm, Vera finds an abandoned vehicle and inside it an abandoned baby. Recognizing that she is close to the family estate of her estranged relatives, she descends upon them to get shelter and t0 c0ntact her team for help. Soon she is caught up in a mystery about the dead mother and puzzling about who is the baby's father. Her team spreads out to interview many, in an attempt to discover significant connections to explain why first one, then a second murder occurs in this small rural enclave. DC Holly plays a more forceful role in this story which is a nice update for her character.