[2] 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.
As a child Cacciola experienced racism and discrimination due to his heritage, which prompted his decision to apply to the Queensland Police in 1965.
[2] Cacciola joined the Queensland Police in 1966 and due to his background was assigned to undercover duties investigating illegal gambling activities within the Italian community.
[2] In the 1970s he witnessed the full extent of corruption within the police force, serving under the now disgraced Sergeant Jack Herbert and former Commissioner Terry Lewis.
[2] In the late 1970s he became a Special Branch detective, spending much of his time breaking up street marches in Brisbane in what was a period of social unrest.