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Multi-isotopes in human hair: A tool to initiate cross-border collaboration in international cold-cases

NCJ Number
PLoS ONE Volume: 17 Issue: 10 Pages: e0275902
Date Published
October 2022

This study developed a framework to use multi-isotope geolocation from human hair to assist in solving international cold cases.


The authors first analyzed and/or compiled 14s values from hair of residents of Canada, the United States, and Mexico. Databases were developed to produce maps predicting 6 2 H and 634 s values in bulk hair of deceased undocumented border crossers who died at the Mexico-U.S. border and were later identified through the Pima County Office of the Medical Examiner. The authors compared the predicted geographic origins from their hair analysis.  (Published abstract provided)

Date Published: October 1, 2022