Nav: Home

Report: Even in death, indigenous border crossers marginalized

May 03, 2017

CHAMPAIGN, Ill. -- Of the hundreds of people who die trying to cross into the U.S. from Mexico each year, those with indigenous backgrounds are less likely to be identified than those with more European ancestry, a new analysis reveals.

The research, reported in the journal American Anthropologist, focused on DNA from individuals found dead in the Arizona desert and transported to the Pima County Office of the Medical Examiner in Tucson, where efforts are made to identify the individuals and return them to living relatives.

The researchers looked at highly variable regions of DNA, called short tandem repeats, that are traditionally used in forensics to identify individuals, "much like a fingerprint," said University of Illinois anthropology professor Cris Hughes, who led the new analysis.

"Forensic DNA analysis can help identify individuals by matching their genetic profiles with their family members', but my colleagues and I have shown in previous work that forensic genetic markers also can reveal information on a person's ancestral makeup," said Stanford University biology professor Bridget Albee-Hewitt, a co-author on the study.

Such DNA technologies have not always been available, but PCOME forensic anthropologists, including Bruce Anderson, a co-author on the new study, have kept samples of bones from unidentified bodies found on the border since the 1970s, making it possible for researchers to return to those cases while also working on newer ones.

The team used the DNA to analyze the ancestry of migrants who had died along the border, comparing those who had been identified with those who had not. That analysis revealed that people with more European ancestry were more likely to be identified than those with indigenous roots.

This is not the result of discrimination on the part of the investigators, Hughes said. The problem lay elsewhere - likely in the system by which authorities obtain the information they need to connect someone who died on the border with surviving family members, she said.

Once DNA is obtained from a body, matching it to a family requires that family to interact with authorities and offer up samples of their own DNA. This is where disparities begin to emerge between people from northern and southern Mexico, the researchers found.

"In Mexico, indigenous populations are concentrated in southern states, and poverty is more prevalent in the south," Hughes said. "There is a deep distrust between indigenous peoples in Mexico and their government, founded on a history of oppression by those in power.

"Interacting with U.S. and/or Mexican government institutions can be daunting for these families," Hughes said. "They may be undocumented themselves and uneasy about contact with any government agency. While most migrants experience these vulnerabilities, those with more indigenous ancestry seem even less inclined to come forward."

A possible solution to the problem involves nongovernmental organizations that can function as bridges between people searching for missing loved ones and authorities who are working to identify the dead, said University of Arizona anthropology professor Robin Reineke, a co-author on the study.

"The importance of community organizations, nongovernmental groups and intergovernmental efforts cannot be overestimated in the context of border disappearances," Reineke said. "Innovative projects, such as those done by the Colibrí Center for Human Rights or the Argentine Forensic Anthropology Team, take a humanitarian approach to the process of reporting and investigating these cases. Such efforts are critical during a time when so many families of the missing face the very same threats - poverty, racism, exclusion and violence - that caused their loved ones to migrate in the first place."
Reineke is a co-founder and executive director of the Colibrí Center for Human Rights in Tucson.

Editor's notes:

To reach Cris Hughes, call 217-333-9694; email

To reach Bridget Algee-Hewitt, call 865-382-7144;

To reach Bruce Anderson, call 520-724-8600.

To reach Robin Reineke, call 520-724-8644; email

The paper "Temporal patterns of Mexican migrant genetic ancestry: implications for identification" is available online and from the U. of I. News Bureau. DOI: 10.1111/aman.12845

University of Illinois at Urbana-Champaign

Related Dna Articles:

Penn State DNA ladders: Inexpensive molecular rulers for DNA research
New license-free tools will allow researchers to estimate the size of DNA fragments for a fraction of the cost of currently available methods.
It is easier for a DNA knot...
How can long DNA filaments, which have convoluted and highly knotted structure, manage to pass through the tiny pores of biological systems?
How do metals interact with DNA?
Since a couple of decades, metal-containing drugs have been successfully used to fight against certain types of cancer.
Electrons use DNA like a wire for signaling DNA replication
A Caltech-led study has shown that the electrical wire-like behavior of DNA is involved in the molecule's replication.
Switched-on DNA
DNA, the stuff of life, may very well also pack quite the jolt for engineers trying to advance the development of tiny, low-cost electronic devices.
Researchers are first to see DNA 'blink'
Northwestern University biomedical engineers have developed imaging technology that is the first to see DNA 'blink,' or fluoresce.
Finding our way around DNA
A Salk team developed a tool that maps functional areas of the genome to better understand disease.
A 'strand' of DNA as never before
In a carefully designed polymer, researchers at the Institute of Physical Chemistry of the Polish Academy of Sciences have imprinted a sequence of a single strand of DNA.
Doubling down on DNA
The African clawed frog X. laevis genome contains two full sets of chromosomes from two extinct ancestors.
'Poring over' DNA
Church's team at Harvard's Wyss Institute for Biologically Inspired Engineering and the Harvard Medical School developed a new electronic DNA sequencing platform based on biologically engineered nanopores that could help overcome present limitations.

Related Dna Reading:

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Moving Forward
When the life you've built slips out of your grasp, you're often told it's best to move on. But is that true? Instead of forgetting the past, TED speakers describe how we can move forward with it. Guests include writers Nora McInerny and Suleika Jaouad, and human rights advocate Lindy Lou Isonhood.
Now Playing: Science for the People

#527 Honey I CRISPR'd the Kids
This week we're coming to you from Awesome Con in Washington, D.C. There, host Bethany Brookshire led a panel of three amazing guests to talk about the promise and perils of CRISPR, and what happens now that CRISPR babies have (maybe?) been born. Featuring science writer Tina Saey, molecular biologist Anne Simon, and bioethicist Alan Regenberg. A Nobel Prize winner argues banning CRISPR babies won’t work Geneticists push for a 5-year global ban on gene-edited babies A CRISPR spin-off causes unintended typos in DNA News of the first gene-edited babies ignited a firestorm The researcher who created CRISPR twins defends...