The National Anti-Corruption Commission (NACC) has formally abandoned its probe into former Liberal staffer Bruce Lehrmann over allegations he swiped secret documents from the office of former defence minister Linda Reynolds.
The decision was conveyed in a letter to Mr Lehrmann on Monday, bringing an end to Operation Ivanhoe, which began with a raid on his home in June 2024. Authorities seized a blue moleskin diary said to contain eight pages of classified security information.
"The former commissioner decided to take no further action concerning the investigation in Operation Ivanhoe," the NACC's letter stated.
Mr Lehrmann then sued Special Minister of State Don Farrell and then-NACC commissioner Paul Brereton, alleging the raids were an abuse of the watchdog's power. He also claims he was unlawfully forced to give evidence at two secret hearings in Hobart in October 2024.
In response to the NACC's letter, Mr Lehrmann said: "The NACC has been a colossal waste of taxpayer money. Over two years the former commissioner used his powers to personally advance a conspiracy that I was a spy and traitor to the nation, selling defence secrets to foreign countries."
He added: "The NACC needs to be abolished and replaced with nothing."
The investigation began after allegations Mr Lehrmann took the documents in 2019, around the time he was accused of raping colleague Brittany Higgins in Ms Reynolds's Parliament House office. A Federal Court judge found the rape allegation proven on the balance of probabilities in 2024, a finding upheld on appeal. Mr Lehrmann denies the sexual assault claims, which have not been tested in a criminal court.
Mr Lehrmann remains subject to a second NACC investigation, Operation Greenough, into whether federal police misused information during their probe into Ms Higgins's alleged sexual assault. His legal skirmishes with Mr Farrell and Mr Brereton are ongoing.