The Myth of Immigrant Criminality and the Paradox of Assimilation: Incarceration Rates Among Native and Foreign-Born Men / Immigration Policy Center, Spring 2007
http://www.ailf.org/ipc/special_report/sr_022107.pdf
Ruben G. Rumbaut, Ph.D, and Walter A. Ewing, Ph.D.
"It is a myth that immigrants increase the amount of crime in the United States. Data from the U.S. census and other sources show that for every ethnic group -- without exception -- incarceration rates among young men are lowest for immigrants. This holds true especially for the Mexicans, Salvadorans, and Guatemalans who make up the bulk of the undocumented immigrant population." [Additional Resources]