Criminal aliens Noncitizens who are residing in the United States legally
or illegally and are convicted of a crime.
Some of the alien population have been arrested and
convicted of various crimes and incarcerated in federal and state prisons
and local jails. DHS refers to these individuals as criminal aliens.2
Immigration and Customs Enforcement (ICE), one of DHS’s components,
is responsible for apprehending and removing those criminal aliens that do
not have a legal right to remain in the United States.
2
As we reported in April 2005, criminal aliens are noncitizens convicted of crimes while in
this country legally or illegally. For more information, see GAO, Information on Criminal
Aliens Incarcerated in Federal and State Prisons and Local Jails, GAO-05-337R
(Washington, D.C.: Apr. 7, 2005).
To determine the types of offenses for which criminal aliens were
arrested, we obtained the Federal Bureau of Investigation (FBI) arrest
histories of about 203,000 criminal aliens incarcerated in state prisons and
local jails from July 1, 2004, through June 30, 2008, and 48,000 criminal
aliens incarcerated in federal prisons as of December 27, 2008, for a total
of 251,000 criminal aliens. Due to the large volume of arrests and offenses,
we selected a random sample of 1,000 criminal aliens and analyzed their
arrest records to estimate the number and types of offenses in our study
population of approximately 249,000.6
There were nearly 1.7 million arrest
records relating to nearly 3 million offenses for these 249,000 criminal
aliens. To determine the type of offenses for which criminal aliens were
convicted, we analyzed data from the U.S. Sentencing Commission on
federal convictions of criminal aliens from fiscal years 2003 through 2009
and conviction data from five states—Arizona, California, Florida, New
York, and Texas—from fiscal years 2005 through 2008. We selected these
five states based on the number of SCAAP criminal aliens. Collectively,
these states accounted for about 70 percent of the SCAAP criminal alien
population in fiscal year 2008.
5
The periods of time covered by these data vary because they reflect updates since we last
reported on these issues in 2005 (see GAO-05-337R and GAO-05-646R). Moreover, they
reflect the most recent data available at the time of our analysis.
Now. Lets look at homicide rates. As per the graph on page 27. Illegal aliens committed 25,064 homicides.
If we calculate for all non-citizens (DOJ BOP) (25.3MIL) which covered 7 years: 25064 / 7 = 3580.5714 / 25.3MIL = .0001415246 * 100,000 = A rate of 14.15 per 100,000.
If we calculate for illegal aliens (SCAAP) (10.8MIL) which covered 4 years: 25064 / 4 = 6266 / 10.8MIL = .0005801852 * 100,000 = A rate of 58.01 per 100,000.
Now, as I said give a high margin of error: ~10%
Still that results in a much higher homicide rate than the average US citizen during the same time period (1993-2012): 6.125 per 100,000
https://ucr.fbi.gov/crime-in-the-u.s/2012/crime-in-the-u.s.-2012/tables/1tabledatadecoverviewpdf/table_1_crime_in_the_united_states_by_volume_and_rate_per_100000_inhabitants_1993-2012.xls