"The alleged murder of Kate Steinle in San Francisco by illegal immigrant Juan Francisco Lopez-Sanchez has reignited the debate over the link between immigration and crime. Such debates often call for change in policy regarding the deportation or apprehension of illegal immigrants.
However, if policies should change, it should not be in reaction to a single tragic murder. It should be in response to careful research on whether immigrants actually boost the US crime rates.
With few exceptions, immigrants are less crime prone than natives or have no effect on crime rates. As described below, the research is fairly one-sided."
By the Numbers: Does Immigration Cause Crime?