Keller, Julia. Bell Elkins novels.

"From the small towns of Appalachia they came, the young men who joined the fight for liberty in World War II. Now they are elderly, and some of them--like Harmon Strayer, father of prosecutor Bell Elkins's former law school classmate--suffer from Alzheimer's. When Harmon dies in an Alzheimer's care facility from what appear to be natural causes, Bell confronts a mystery that brims with questions about memory, grief and the lethal cost of burying the past. During a winter of record snow and cold, Bell and the people of Acker's Gap, West Virginia, face isolation and hardship--and the threat from a killer who preys upon the old and the sick and the helpless"--