Noted:Â Undocumented immigrants are also less likely to commit serious criminal offenses, according to research conducted by Cato. Using government-supplied data from the Texas Department of Safety, the libertarian think tank concluded that in Texas the murder arrest rate for native-born Americans was “about 46 percent higher than the illegal immigrant homicide rate,” according to a June 2018 research note. Another study, performed by researchers at the University of Wisconsin, found that “increased concentrations of undocumented immigrants are associated with statistically significant decreases in violent crime.”