Although researchers have begun to piece together a picture of the characteristics of vulnerable individuals, participating industries, and exploitative practices that may lead to labor trafficking, few studies have systematically reviewed labor trafficking cases known to victim service providers and law enforcement officials in the United States. As a result, little is known about the phenomenon of labor trafficking and the illicit networks that support it.For example, it is not known if those networks that facilitate certain types of labor exploitation also facilitate certain types of labor trafficking. This study seeks to address these gaps in knowledge by providing foundational information about labor trafficking victimization and the illicit networks that facilitate it across a range of industries. This study was guided by three research questions:What is the nature of the labor trafficking victimization experience in the United States?How are domestic and international labor trafficking syndicates operating in the United States organized? Who are the traffickers, and what is their connection to other illicit networks that help facilitate labor trafficking operations?What are the challenges of law enforcement agents investigating labor trafficking cases identified by victim service providers? Why are so few identified labor trafficking cases investigated by law enforcement and prosecuted?