Thomas Chastain (January 17, 1921 – September 1, 1994) was an American author of crime fiction. He is best known for his bestseller Who Killed the Robins Family? And Where and When and Why and How Did They Die? as well as the sequel to that work. He was born January 17, 1921 and died in September 1994. He served as the president of Mystery Writers of America in 1989. He was also known as Nick Carter and Thomas Chastain, Jr.