The Dark of Winter — Richard Mueller

Sheriff Glen Gleason's life has gone horribly wrong. Now, on the edge of a breakdown, he's suddenly pulled back from the brink to solve a horrible multiple murder -- an entire family slaughtered by a fiend who has disappeared without a trace. Fighting his way past interference from inept state and federal cops, aided by Kat van Kirk and his other deputies, and Carol Fraser, a troubled profiler sent down by the state capitol, Glen Gleason finds himself in a personal battle of wills with a trained assassin who vows to keep killing until Glen brings him down.