Chapter 2 presents the methods of the current study. Three fieldwork projects in two cities are explained, including one researcher’s embeddedness with a plain-clothes, street crime unit, one researcher’s 10 month inclusion with a narcotics investigation unit, and one author’s 18 months of participant observation with a major city’s homicide investigation unit. Additionally, in-depth interviews with 15 federal, state and local law enforcement authorities were conducted. These three sources of data are integrated and triangulate the data used for the analysis.