IMBs are venues disguised as legitimate massage or bodywork businesses in which women are forced, coerced, and defrauded into performing countless sex acts with strangers on a daily basis. This portion of the three-part series provides an overview of the illicit massage business (IMB) organizational model, which typically exists within one of many nationwide networks. The presenters discuss how women are recruited, harbored, and exploited within those networks. They also explore the challenges facing law enforcement and prosecutors, demonstrating the need for strategies to build evidence-based cases that can ensure that offenders are held accountable for their wide-ranging criminal activity.