Aaron J. Chalfin, PhD, Assistant Professor of Criminology at the University of Pennsylvania, in an undated blog post accessed on May 22, 2019 and titled, "Do Mexican Immigrants 'Cause' Crime?," available at, stated:

“For those who are skeptical that these findings are true, consider the case of El Paso, Texas a working class city of approximately 700,000 people that sits opposite the Rio Grande river from Ciudad Juarez, one of the most violent and lawless cities in Mexico. More than 80% of El Paso’s residents are Hispanic and the vast majority of these individuals are of Mexican origin. A large population of El Paso’s Hispanic population are immigrants. In fact, El Paso has one of the highest proportions of immigrants among U.S. cities. Many of these migrants are undocumented. If those who fear Mexican immigration are right, then El Paso should be a hotbed of violence. As it turns out, El Paso is one of the safest cities in the United States with a homicide rate of 2.4 per 100,000 residents. Just a tiny handful of American cities have a lower homicide rate and most of those that do (San Diego, Chula Vista, and Mesa, AZ, for example) also have outsize Mexican populations. Incredibly El Paso’s homicide rate is so low that it compares favorably to European capitals like London, Paris and Amsterdam, cities which have rates of lethal violence that are generally an order of magnitude lower than cities in the United States.

To summarize, while it is right for Americans to be concerned about the equality of the immigrants we attract, there is simply no evidence to support that Mexican immigration should be a cause for concern. If anything, there is quite a bit of evidence that the immigrants we attract from Mexico serve to make us safer than we otherwise would be.”

May 22, 2019