BOCSAR produces a quarterly and annual report series examining trends in crime reported to, or detected by, the NSW Police Force. These reports focus on statistical trends across a 24-month period. The data were extracted from the Computerised Operational Policing System (COPS) of the NSW Police Force.
The number of murder victims reported in years 2011 to 2017 have been revised upwards following a recent audit. The update increased the number of murders by 4% over those years. In some instances the error occurred where a victim initially recorded as having being assaulted later died from their injuries.
The number of recorded drug possession incidents reported in years 2010 to 2017 has been revised down due to double counting of some drug possession incidents that came to police attention through a person search.