Diane Fanning is an American author known for her work in the true crime genre. She has written numerous books that explore real-life criminal cases, often focusing on the psychological aspects of the individuals involved. Fanning's writing is characterized by thorough research and a compelling narrative style. In addition to her true crime books, Fanning has also written novels and contributed to various anthologies. Her work has garnered attention and praise, making her a notable figure in contemporary crime literature. She often appears in media discussions related to crime and justice, further establishing her expertise in the field.