The Fingerprint Murders — Gerald W. Darnell

Someone is brutally murdering people in Memphis, and for unknown reasons, the killer wants Carson involved.
They're not just killing people, they're removing the victim's fingers and leaving strange clues everywhere. Carson becomes involved when the killer sends him severed thumbs - each wrapped in bloodstained paper containing Bible scripture.
Clues are everywhere, but none of them make any sense and aren't connected - yet.
Old names surface and the mystery gets stranger and darker as Carson tries to solve the ‘Fingerprint Murders'.