The Benefit of Hindsight — Susan Hill

In this 10th book in Susan Hill's shattering series, Serrailler must confront his demons as Lafferton experiences a sequence of shocking crimes
 
Susan Hill stuns readers once again in The Benefit of Hindsight, the 10th book in her celebrated mystery series. Featuring the enigmatic and brooding chief police inspector Simon Serrailler, this sophisticated and heart-pounding series follows a collection of grisly crimes in the town of Lafferton -- and The Benefit of Hindsight is the most disturbing installment yet.
Now recuperated after the violent incident that cost him his arm -- and nearly his life -- DCS Serrailler has returned to work, though he prefers to spend his spare time sketching the medieval angels being restored on the cathedral roof. With crime rates down, Lafferton has been quiet, until one night when a couple opens their front door to a distressing scene. Serrailler makes a serious error of judgment when handling the incident, and the stress of this, combined with the ongoing trauma of losing his arm, takes its toll, throwing his very future into doubt. In the tradition of the fabulous mysteries of Ruth Rendell and P. D. James, The Benefit of Hindsight is Susan Hill's best work yet -- a superbly plotted, chilling new addition to a highly acclaimed series.