For All Our Sins by T. M. E. Walsh. Published by Carina UK

DCI Claire Winters is tracking down a particularly vicious killer. The victim was a priest whose murder was long, drawn out and very painful. Winters realizes the crime was most likely committed by someone with a great deal of rage. But there seem to be no leads. The closer Claire gets to the priest’s family, the more tangled and confused the case gets. But she’ll have to find answers, and fast, because the killer isn’t done, not by a long shot