These findings build on the conclusions of a large 2018 study in which researchers Graham Ousey and Charis Kubrin examined 51 studies on immigration and crime published from 1994 to 2014.
While this study may have been created in 2018, it is important to note that most, if not all, of this information could be outdated, as it says the most recent information is from 2014, over eleven years ago.
Using two different estimates of the undocumented immigrant populations for 154 metropolitan areas in our most recent study
It seems that they were very thorough in their data taking; 154 is a lot of places to get averages for.
In statistical models that did identify a significant relationship between undocumented immigration and crime, we found undocumented immigration reduces property crimes, such as burglary.
While it states that the presence of more undocumented migrants reduces property crime, it makes no mention of other types of crime. I find this confusing, as there are many other types of crime, and statistics could show a completely different picture in those areas.