The Custodian is a 1993 Australian mystery thriller film written and directed by John Dingwall in his last directorial effort before his death on 3 May 2004.
James Quinlan, a police officer who attempts to bring to justice a cabal of corrupt cops, which includes his partner, Det.
Detective James Quinlan leaves his wife after years of being nagged about their lifestyle, comparing him unfavourably with his friend and partner Frank Church whom he believes, but cannot prove, is corrupt.
He abandons his straight life to join Church in order to get on the inside of the circle of double-agents, whose extent he cannot guess but must include high-ranking police, and probably judiciary and media.
He establishes contacts with a young idealistic reporter and Ferguson, an Internal Affairs lawyer without revealing his identity, meanwhile building a dossier of corrupt officers, including himself.