One of Murphy's more dramatic actions as Attorney-General was his sudden visit to the Melbourne headquarters of the Australian Security Intelligence Organisation (ASIO) on 16 March 1973. This came about because ASIO officers were unable to satisfy his requests for information concerning intelligence on supposed terrorist groups operated by Croatian Australians. Murphy's concern about the matter was heightened by the impending visit to Australia of the Yugoslav Prime Minister Džemal Bijedić. ASIO officers claimed not to be able to locate the file with which to properly brief Murphy. Murphy's belief was that, though a security service was an important part of the Australian social fabric, like any other arm of executive government it must be accountable to the relevant Minister. According to journalist George Negus, then Murphy's press secretary: "Lionel had asked for the files of the six most dangerous or subversive people in Australia". When the files arrived, Murphy found they were of several Communist Party (CPA) unionists and people such as CPA leader and peace movement activist Mavis Robertson. When he told Whitlam, they both laughed.