Sanctuary policies protect immigrants but don't threaten public safety

October 19, 2020

Sanctuary policies are at the center of the debate over immigration enforcement in the interior of the country. President Trump has called those policies "deadly" and claimed that they prevent the deportation of violent criminals and increase crime.

Those claims are not true, according to a new study published in the Proceedings of the National Academy of Sciences by Stanford University researcher David Hausman, a postdoctoral fellow at Stanford's Bill Lane Center for the American West and an affiliate of Stanford's Immigration Policy Lab.

"What I found is that sanctuary policies really do protect immigrants, and they also don't do any harm to public safety," Hausman said. "In fact, the data show that sanctuary policies have no measurable effect on crime."

Using datasets from Immigration and Customs Enforcement (ICE) and the Federal Bureau of Investigation (FBI), Hausman studied the onset of sanctuary policies in 140 counties between 2010 and 2015. He found the following:"I hope that this study brings some facts to a debate that has too often relied on assertions," Hausman said.

Delving into the Data

"Sanctuary" describes a wide range of local policies limiting cooperation with federal immigration enforcement. (Sanctuary policies have no impact on whether a person is arrested, charged, convicted, or sentenced for a criminal offense.) This study focuses on sanctuary policies' key element: prohibiting local law enforcement from complying with ICE requests that jails lock up immigrants past the date when they would normally be released.

Every time police officers make an arrest, they send the person's fingerprints to the FBI, which in turn automatically shares them with ICE. If ICE identifies the person as an immigrant eligible for deportation in its own databases, it can issue a detainer to the local jail, requesting that the jail hold the person beyond the scheduled release date. This gives ICE officers extra time to pick up the person and place him or her into deportation proceedings.

For his study, Hausman looked at 369,388 deportations between November 2008 and December 2015 that began when a noncitizen was arrested by local law enforcement. At the time when many sanctuary policies were taking effect (2014-15), this kind of deportation made up 55 percent of all deportations ICE initiated from the interior of the country. Hausman focused on 296 large counties during that period, which accounted for more than 80 percent of all deportations that began with a local arrest. Of those 296 counties, 140 adopted sanctuary policies (or were affected by a state sanctuary policy) between 2010 and 2015.

Hausman then compared sanctuary and non-sanctuary counties before and after the policies were adopted. While the two groups looked roughly the same before the policies were introduced, they diverged just a few months afterward. Deportations fell by a third in sanctuary jurisdictions, but there was no decline in deportations of people with violent convictions.

In a way, it's not surprising that sanctuary policies did not protect people with violent convictions from deportation. Many sanctuary policies make exceptions for violent crimes, allowing local police to comply with ICE detainer requests for noncitizens with such convictions. And people with those convictions are more likely to serve sentences in state prisons, where ICE can easily locate them before their release.

To measure the effect of sanctuary on crime, Hausman looked at 224 large counties, narrowing the list to those that consistently reported crime data each month. Sanctuary policies appeared neither to increase crime rates nor help police solve crimes.

Taken together, these findings show that even as these policies reduce deportations, they do not harm public safety.
-end-


Stanford University - Immigration Policy Lab

Related Immigrants Articles from Brightsurf:

Immigrants who naturalize outearn their peers
Looking at municipalities in Switzerland where citizenship applications were put to a popular vote, researchers identified immigrants who narrowly won or lost and tracked their earnings over the next several decades.

US-born residents more than 5 times likely to use prescription opioids than new immigrants
The longer immigrants live in the United States, the more likely they are to use prescription opioids -- a fact that contradicts popular views linking wealth and health, and suggests that American culture is uniquely favorable toward prescribing opioids.

Length of time in US associated with immigrants' opioid use
The more time first-generation immigrants spend in the United States the more likely it appears they will use prescription opioids.

Undocumented immigrants' transplant survival rates on par with US citizens'
Unauthorized immigrants who receive liver transplants in the United States have comparable three-year survival rates to US citizens, according to a study by researchers at UC San Francisco.

Immigrants who committed felonies less likely than nonimmigrants to commit another felony
A new study compared recidivism rates of foreign-born and native-born individuals formerly incarcerated for felonies and released from prisons in Florida.

Uncovering the roots of discrimination toward immigrants
Immigrants are often encouraged to assimilate into their new culture as a way of reducing conflict with their host societies, to appear less threatening to the culture and national identity of the host population.

Immigrants: citizens' acceptance depends on questions asked
How many immigrants per year should Switzerland be prepared to welcome?

How societal attitudes, political rhetoric affect immigrants' health
For immigrants to the United States, the current political climate, and debates over issues such as a border wall, become part of the environment that influences their health, according to a new University of Washington study.

UK prejudice against immigrants amongst lowest in Europe
A new study published in Frontiers in Sociology challenges prevailing attitudes on Brexit, the nature of prejudice, and the social impact of modernization.

Research shows biases against immigrants with non-anglicized names
Using variations of the 'trolley-dilemma' where people choose who to save or not save others in a hypothetical situation, social psychologists show that for certain groups, under certain conditions in a hypothetical scenario, having an anglicized name means you're more likely to be saved than if you kept your original Asian or Arab name.

Read More: Immigrants News and Immigrants Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.