J. Diego Vigil, Ph.D., professor in the Department of Criminology, Law and Society and Education, University of California, Irvine-USA. His education includes Ph.D. and M.A. in Anthropology, University of California, Los Angeles. He just completed a one year of teaching as a visiting professor at Harvard in the Graduate School of Education. Prior to that he taught at UCLA for six years and USC for fourteen years. His expertise is in urban, psychology, socialization and educational anthropology, Mexico and U.S. Southwest ethnohistory. Some of his books are: From Indians to Chicanos: The Dynamics of Mexican American Culture, Personas Mexicanas: Chicano High Schoolers in a Changing Los Angeles, Barrio Gangs: Street Life and Identity in Southern California, A Rainbow of Gangs: A Cross-Cultural Study Street Youth in Los Angeles. He also acts as a consultant, expert witness, in cultural defense in gang related homicides. He was Director, Center for the Study of Urban Poverty, Chairman, The National Center for Gang Policy, Director of Ethnic Studies, University of Southern California.