Detective Sergeant Peter Diamond is a fictional character created by author Peter Lovesey. He is known for his work in the Bath police department in England, where he tackles various criminal cases with a keen eye for detail and a strong sense of justice. Diamond is characterized by his no-nonsense attitude and a deep understanding of human behavior, which aids him in solving complex mysteries. His personality often reflects a blend of determination and occasional frustration, especially when faced with bureaucratic challenges or uncooperative witnesses.