WEBDec 20, 2022 · Key achievements. IBAC's key achievements in 2021/22 include: reviewing 258 police investigations, a 303 per cent increase on 2020/21; receiving 3728 complaints/notifications, a 30 per cent increase on 2020/21; assessing 5646 allegations of suspected corruption or police misconduct, a 13 per cent increase on 2020/21; commencing 30 investigations and preliminary inquiries into alleged serious ...