Domenico Cacciola (born 1945 in Sicily) is a decorated police officer who joined the Queensland Police in 1966. He became an undercover detective in the 1970s. In 1977 he received the Queen's Commendation for Brave Conduct, and the National Medal (Australia) in 1991. After retiring in 2001, he wrote his memoir with the assistance of his brother Carmelo Cacciola and journalist Ben Robertson. In 2009 the University of Queensland Press published his autobiography The Second Father, which detailed how he resisted underworld crime and the corruption which was rampant within the Queensland Police until the Fitzgerald Inquiry. His second book, Who's Who in the Zoo, is an insiders story of crime and corruption in the police force, when he was a CIB and Special Branch detective.