Ransom for Our Sins — Fred W. Hunter

NO REST FOR THE WICKED
The young man's body was found nude, the marks on his palms and feet revealing his grim fate: he had been crucified. The body is later identified as a parishioner of the Community of the Lord Church.

As Chicago police detective Jeremy Ransom investigates the cultlike enclave led by its rigid and autocratic minister, the invisible bond of the community tightens. But Ransom is convinced that the killer lurks among them, especially when another victim meets the same torturous death.

With insightful help from his surrogate grandmother, Emily Charters, Ransom discovers the truth that did not set these victims free...it only got them dead.