Illegals causing more crime than citizens?

Undocumented immigrants causing more crime than citizens?

PHOENIX -- While national data is inconclusive, research in Arizona shows a correlation between illegal immigration and crime.
The most recent report by the Maricopa County Attorney's Office found 22 percent of convicted felons were here illegally and that 18 percent of property crimes in the county were committed by undocumented immigrants.
Figures from the Arizona Department of Corrections show 15 percent of its inmates are "criminal aliens."
Meanwhile, federal estimates show only nine percent of Maricopa County's population and eight percent of the statewide population are here illegally.
"That would imply pretty strongly that illegal immigrants are committing a disproportionate share of crime," said Steven Camerota, director of research at the Center for Immigration Studies in Washington, D.C., a group that claims to be non-partisan.
Arizona has become a battleground over illegal immigration.