Daniel E. Martínez is an Assistant Professor of Sociology at the University of Arizona. His research and teaching interests include race and ethnicity, unauthorized immigration, and criminology. He is particularly interested in the increasing legal and social criminalization of unauthorized migration. Martínez also does extensive research on undocumented border crosser deaths along the US-Mexico border. He is one of three co-principal investigators of the Migrant Border Crossing Study, a Ford Foundation-funded research project that involves interviewing recently deported unauthorized migrants about their experiences crossing the US-Mexico border and residing in the United States. Martínez’s current research focuses on the relationship between so-called “sanctuary” policies and city-level crime rates, future migration intentions among recently deported unauthorized Mexican immigrants, and coyotaje (human smuggling) in the US-Mexico borderlands.