That enabled Fitzgerald to set a precedent for commissions of inquiry and Royal Commissions in Australia generally, using innovative methods, such as indemnities from prosecution for key witnesses, to secure vital evidence. He began formal hearings on 27 July 1987. The inquiry was initially expected to last about six weeks; it instead spent almost two years conducting a comprehensive investigation of long-term, systemic political corruption and abuse of power in Queensland. Public sittings were held on 238 days, hearing testimony from 339 witnesses.