I remember watching an episode of first 48, detectives were called to a house where everyone in the house was dead. They were confused because there were no signs of forced entry, nothing out of place… the adults in the home were just dead. When they started looking for clues in the home, they found they all died of starvation. The deceased kept journals and they were doing some sort of testing the faith type thing, showing their faith in God and he will provide food, something like that. You could tell the detectives were really bothered by this case.