Undocumented Immigrants - some data

From the Crime Prevention Research Center: John Lott's paper "Undocumented immigrants, U.S. Citizens, and Convicted Criminals in Arizona.

JL's paper can be found here.

Here is the Summary.
----------------------------------------------
Based on data from 1985 to 2017, undocumented immigrants are at least 142% more likely to be convicted of crime than other Arizonans.

Undocumented immigrants tend to commit more serious crimes and serve 10.5% longer sentences than do U.S. citizens.

Undocumented immigrants are 163% more likely to be convicted of 1st degree murder than are U.S. citizens, 168% more likely to be convicted of 2nd degree murder, and 189.6% more likely to be convicted of manslaughter. Those three categories and negligent homicide added up to 987 convictions. Undocumented immigrants are also much more likely to commit sexual offenses against minors, sexual assault, DUI, and armed robbery.

Young convicts are especially likely to be undocumented immigrants. Undocumented immigrants born after June 15, 1981 are eligible for Deferred Action for Childhood Arrivals (DACA). While undocumented immigrants from 15 to 35 years of age make up a little over two percent of the Arizona population, they make up almost 8% of the prison population. These immigrants also tend to commit more serious crimes.

Undocumented immigrant criminals are 45.4% more likely than other criminals to have been gang members, and 133% more likely to receive sentencing enhancements for being classified as dangerous.

These numbers may give an artificially low estimate of the share of crime committed by undocumented immigrants. Undocumented immigrants may commit many of their crimes against each other, and their victims may be afraid of calling the police or testifying at trial because of their undocumented status.

While undocumented immigrants are more likely to be convicted of crimes, they also exhibit extremely low recidivism and criminal history rates. Among criminals who are U.S. citizens, a small subset keeps going in and out of prison. Among undocumented immigrants, a much larger proportion go to prison once or twice and then never return to prison. 24.8% of U.S. citizens were admitted five or more times in the Arizona Department of Corrections, but that same number is only 2.95% for undocumented immigrants. The evidence suggests that these individuals leave Arizona after being incarcerated.

If undocumented immigrants committed crime nationally as they do in Arizona, in 2016 they would have been responsible for over 1,000 more murders, 5,200 rapes, 8,900 robberies, 25,300 aggravated assaults, and 26,900 burglaries.