The inquiry had earlier heard there were two alleged channels for leaks of sensitive information in 2007 from the investigation into the 2003 murder of Shane Chartres-Abbott.
One of the sources was Nicola Gobbo, who was in September 2007 specifically tasked by her police handlers with passing on information to a police officer suspected of being involved in the killing.
The second channel was then-police media boss Stephen Linnell, who allegedly passed sensitive information he received in his role to then-assistant commissioner Noel Ashby who passed it to police union boss Paul Mullett.
Mr Linnell was initially handed a suspended jail term over leaks but, despite his guilty pleas, a court later quashed the convictions. Mr Ashby and Mr Mullett, who both attended the royal commission on Tuesday, were acquitted but lost their careers.
Mr Overland made a statement when the independent Office of Police Integrity launched an investigation into the leaks, but said nothing about Ms Gobbo’s role.
Ruth Shann, SC, representing Mr Mullett, accused the former police chief of destroying reputations.
“You created a deceptive … affidavit that was provided as part of material used in a public hearing, to create immense reputational damage to three men and to further hide and cover up the use of Nicola Gobbo,” Ms Shann said.
“No, I don’t accept that,” Mr Overland replied.
Mr Overland said it wasn’t for him to ensure the OPI knew about other leaks.
His lawyer, Jeff Gleeson, QC, asked him whether being tasked by handlers would be categorised as unauthorised, as those were the specific leaks being investigated.
“No, it would be a controlled leak,” Mr Overland said.