In February 2018, Victoria Police advised IBAC that more than 250,000 preliminary breath tests (PBTs) appeared to have been falsified by some police officers, allegedly to meet testing quotas.
With the agreement of IBAC, Victoria Police established Taskforce Deliver led by former Chief Commissioner Neil Comrie AO, APM to conduct an investigation into the falsification of PBTs by Victoria Police officers and prepare a report. In November 2018, Taskforce Deliver concluded that the practice of falsification of PBTs by officers was widespread and made 23 recommendations to Victoria Police to address the identified issues. IBAC has been overseeing Victoria Police's implementation of the Taskforce Deliver recommendations.
Victoria Police also conducted four individual investigations into alleged falsification of PBTs, instigated because of potential aggravating circumstances identified during Taskforce Deliver. These aggravating circumstances included bullying, harassment and abuse of position or seniority.
As part of its police oversight role, IBAC reviewed these four internal investigations to ensure they were conducted thoroughly and impartially. The reviews were conducted individually between August – November 2021.