Hidden Without Danger

The place where it happened was a series of murders in City B, and the murderer was skilled in committing the crime. There was no available evidence at each crime scene. City B was an old city, so there was no surveillance, and the investigation of the murderer was extremely difficult. A cross embedded in the skull of the deceased, and a special Bible sewn into the heart of the deceased were left at the scene. The death of each deceased was extremely tragic, and they were made into works of art symbolizing the seven deadly sins. There are seven works in total. All the police officers and forensic doctors failed to find the murderer until the end of the novel, but the murderer is...