"The AFP has conducted a thorough investigation into this matter, which is now concluded, and we will be taking no further action," a federal police spokesman told Fairfax Media. The nature of the AFP's findings remains a mystery, including the exact timing of the files' disappearance. The Department of Prime Minister and Cabinet confirmed it had received the report and was considering a response. It refused to say how long it had been sitting on the report, but Fairfax Media understands the investigation finished more than two weeks ago. Described as one of the biggest national security breaches in Australian history, the Cabinet Files revealed secret cabinet discussions during the Howard, Rudd, Gillard and Abbott governments. The furniture was bought on the cheap by a "bushie", who discovered the documents that lurked within and handed them over to the ABC, which subsequently published nine stories covering refugee policy, welfare cuts, the NBN and other lost documents.