Illegal border crossings have been dropping since 2000.
In 2017, apprehensions were at their lowet point in 46 years Joe Ward and Anjali Singhvi at NYT:
Undetected illegal border crossings have dropped at an even faster rate, from 851,000 in 2006 to approximately 62,000 in 2016, according to estimates by the Department of Homeland Security.
However, there is one group of migrants that is on the rise: families. A record number of families have tried to cross the border in recent months, overwhelming officials at the border and creating a new kind of humanitarian crisis.
...S]everal studies have found no link between immigration and crime, and some have found lower crime rates among immigrants.
Texas, which has the longest border with Mexico and has one of the largest populations of undocumented immigrants of any state, keeps track of immigration status as part of its crime data. The Cato Institute, a libertarian research center, analyzed the Texas data for 2015 and found that the rate of crime among undocumented immigrants was generally lower than among native-born Americans.
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