Glad you asked, because, unlike lots of folks, I don't just believe what Trump spews on the daily.
This study used uniquely comprehensive arrest data from the Texas Department of Public Safety to compare the criminality of undocumented immigrants to legal immigrants and native-born U.S. citizens between 2012 and 2018.
www.ojp.gov
Plenty more where that came from. But don't just believe me either. I am no expert. Look it up yourself...crime rates of different groups are readily available. People...not just Trump... spew crap numbers all the time and they COUNT on people being too lazy to look it up.
I have looked it up.
There are lies, damned lies and then there are statistics.
Activists and academics have been misusing data from the Texas DPS in studies claiming that illegal immigrants have relatively low crime rates.
cis.org
Table 1 contains the complete DPS data that we received from our 2021 request, along with the crime rates that we calculated using Census population data. It is sorted first by year, then by the offenses for which illegal immigrants are most likely to be convicted relative to the state population as a whole.
As the table indicates, illegal immigrants in Texas appear to be convicted of crimes such as homicide, sexual assault (shown in Figure 2), and kidnapping at higher rates than the state average. By contrast, they appear to be convicted at lower rates for crimes such as robbery and drugs.
There are two crucial caveats associated with Table 1. First, the “Illegal Conviction Rate” is still underestimated. It is simply the number of illegal immigrant convictions identified by DHS plus the number of illegal immigrant convictions identified subsequently in prison, all divided by the total illegal immigrant population in Texas.2 More illegal immigrants could move out of the other/unknown category over time — especially in the most recent years, as discussed above.
A second caveat is that comparisons of the types of crimes that illegal immigrants commit are inherently skewed. The longer people with unknown status are in custody, the more likely it is that Texas will correctly ascertain their immigration status. DHS and Texas DCJ have extensive time and incentive to investigate an individual’s immigration status when the crime is murder or sexual assault. Lesser offenses (e.g., larceny) carry shorter sentences and are a lower priority for deportation purposes, resulting in fewer unknown statuses moving to the “illegal immigrant identified in prison” category over time.
Therefore, the most serious crimes tend to generate the most accurate illegal immigrant conviction rates. Since serious crimes are only a small portion of all crimes, however, any estimate of illegal immigrants’ conviction rate for “all crimes” is practically meaningless, given the limitations of the data.