Between 2007 and 2016, violent crime decreased slightly and similarly across most areas, regardless of whether the undocumented population rose or fell.

A large majority of the areas recorded decreases in both violent and property crime between 2007 and 2016, consistent with a quarter-century decline in crime across the United States. The analysis found that crime went down at similar rates regardless of whether the undocumented population rose or fell. Areas with more unauthorized migration appeared to have larger drops in crime, although the difference was small and uncertain.

Also: As of 2016, there were an estimated 10.7 million undocumented immigrants nationwide, down a million and a half since 2007.

http://www.nytimes.com/2019/05...tories&pgtype=Homepage