HIV/acquired immune deficiency syndrome (AIDS) and criminal justice involvement are critical intersecting public health issues for drug-involved men. Low income, Black and Hispanic men especially bear the burden of the HIV epidemic and are over-represented in the U.S. criminal justice system. Recent Centers for Disease Control and Prevention (CDC) surveillance data suggest that the health disparity in HIV rates is actually increasing for Black men: current estimates suggest 1 in 16 Black men in the U.S. will be infected with HIV in their life time. These HIV/STI transmission risks are fueled by high rates of poverty, incarceration, unemployment, and lack of access to health care and prevention services. The proposed study thus targets an underserved population at the epicenter of the epidemic in the U.S.