This report utilises data from the Drug Use Monitoring in Australia (DUMA) program to determine patterns of substance use and crime in a sample of detainees in the Pilbara region, Western Australia. The study compares data from the DUMA program in both South Hedland and Perth. The findings show that the detainees in both detainee samples are similar in gender, age, level of education attained, number of dependent children or work status. It highlights that the samples are similar in regard to age at first consumption of alcohol, excessive consumption of alcohol, and excessive use in the past year. They also are similar in regard to age at which they first used illicit drugs and in how much they believe that drugs are related to their current detention.