A number of separate, but overlapping, investigations were conducted by the police into various aspects of the 2000 coup. These investigations include the organization and financing of the coup, and the identity of the perpetrators. Some alleged that George Speight was only a front-man for a shadowy group of politicians and businessmen; former prime minister Sitiveni Rabuka was reported to be one of those under investigation. Police Commissioner Andrew Hughes revealed on 4 January 2006 that seven major investigations were currently in progress. In addition, a number of other investigations have either taken place or are being considered.
Commissioner Hughes announced on 5 December 2005 that while some police files contained insufficient evidence, being based to a large extent on hearsay, other files did contain incriminating evidence sufficient to lay charges. He revealed on 4 January 2006 that 21 officers were assigned, four of them full-time, to the seven major investigations, and that allegations made by Maciu Navakasuasua, a coup-convict, and Josaia Waqabaca, a self-declared coup-plotter, had led to three files being reopened. All seven cases would be referred to the office of the Director of Public Prosecutions (DPP) by the end of the month, he said.
The first investigation involves the resignation of the then-President, Ratu Sir Kamisese Mara, on 29 May 2000 and the abrogation of the Constitution by the Interim Military Government, 2000 of Commodore Frank Bainimarama which took over. On 21 May 2003, the Police Investigations Department revealed that they had opened an investigation into whether Ratu Mara's resignation had been forced. Police declared at the time that they were facing "many challenges" in their investigation, finding many officers uncooperative – a stance reiterated by police several times, most recently by Hughes on 5 January 2005.
Hughes said that this case was legally complex, and that it was compounded by the non-cooperation of key individuals. A meeting is expected to be held between the police and the Director of Public Prosecutions (DPP) to consider certain legal questions that may have a bearing on this case.