A number of studies reveal a strong linkage between SC use and avoiding positiveurine creens. Despite this work and given the high rates of criminal justice supervision among Black men in the U.S., little is known about SC usage among Black men under criminal justice supervision. In-depth qualitative interviews were conducted with 11 Black men under criminal justice supervision treated by an urban ED for violent injury. Themes that emerged from the analysis include 1) prevalence of use, 2)health literacy, 3) availability and costs, 4) negative side effects, and 5) criminal justice supervision. Criminal justice supervision policies are a contributing factor to SC use among Black men under criminal justice supervision.