In the Bleak Midwinter by Julia Spencer-Fleming

Clare Fergusson, St. Alban's new priest, fits like a square peg in the conservative Episcopal parish at Millers Kill, New York. She is not just a "lady," she's a tough ex-Army chopper pilot and nobody's fool. Then a newborn infant left at the church door brings her together with the town's Police Chief, Russ Van Alstyne, who's also ex-Army and a cynical good shepherd for the stray sheep of his hometown. Their search for the baby's mother quickly leads them into the secrets that shadow Millers Kill like the ever-present Adirondacks. What they discover is
a world of trouble, an attraction to each other--and murder...