IntroductionAlthough anabolic-androgenic steroid (AAS) use is associated with an increased risk of violent behaviour, this relationship is complex. Many methodological issues also exist with current studies and most focus on community or prison settings, targeting people who use AAS only. This will be the first Australian study to compare police detainees who at the time of arrest report the use of AAS with those who report using other substances in the past 12 months; focussing on demographic characteristics, most serious charged offences and presence of poly-drug use. MethodsData is drawn from the Drug Use Monitoring in Australia (DUMA) program, which collects data around drug use and criminal justice information from police detainees across Australia. Data was requested for 2017-2021. Our sample included 10,105 offenders who reported substance use, including 312 who had used AAS. ResultsWe found that detainees who had used AAS in the 12 months before their offence were charged with violent crimes (40.5%) at a similar rate to those who used substances other than AAS (36.5%). We found high rates of other substance use amongst AAS-using detainees, particularly alcohol and stimulants. Discussion and conclusionsCommitting violent offences does not seem to be a unique feature of individuals using AAS, with the prevalence of violent crime among detainees no different to those who use other substances. It however did form the most serious offence of the majority of detainees who used AAS. Drug programs for violent offenders to overcome their drug dependence and criminal offending are however absent.