John Lutz: Fear the Night (USA 2005)
From the Publisher:
Repetto paid his dues. Over twenty years on the force, obtaining a captain's rank, and injured in the line of duty, he's earned his retirement. Yet he can't help feeling responsible for the lives The Night Sniper has taken, and will continue to take if his challenge remains unanswered. The decision is snatched from his hands when the next victim is murdered right before Repetto's eyes. Now, the game is truly set to begin, but The Night Sniper doesn't realize that they're playing by Repetto's rules...
John Lutz: Fear the Night. Pinnacle Books, ISBN: 0786016345 (November, 2005), 479 p., $6.99.