Little of the literature on crime at the neighborhood level examines whether and why some crime types predominate in a given neighborhood over other types. Many macro-level theories do make predictions about the sort of crimes that occur in some neighborhoods, although they remain largely untested. This study focuses on one of these theories, differential opportunity, and its predictions about the making of violent neighborhoods. Drawing on various data sources, this inquiry determines whether crime profiles differ across Chicago neighborhoodsthat is, whether there is significant variation across neighborhoods on ratio of violent crimes to other crime types. Next, it also investigates whether the structural factors implicated in the differential opportunity perspective distinguish these neighborhoods or only predict the incidence of crime. The results reveal significant differences in the distribution of crimes across neighborhoods, as well as show that certain factors identify neighborhoods that favor violence over other crimes.Christopher J. Schreck is an associate professor in the Department of Criminal Justice at the Rochester Institute of Technology. His recent work has attempted to locate unique factors in the etiology of violent versus nonviolent crimes, as well as the reasons for differential outcomes in victimization.