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Radhavinod Raju (Malayalam: രാധാവിനോദ് രാജു 27 July 1949 – 21 June 2012) was an Indian Police Service (IPS) officer. He joined the police service in 1975 as Jammu and Kashmir cadre batch. The character Sethurama Iyer, who is the main protagonist of CBI film series in Malayalam films, portrayed by Mammootty is said to have been inspired by Radha Vinod Raj.