Evaluación de los resultados de ADN para la identificación de víctimas de derechos humanos en Chile

Translated title of the contribution: Evaluating DNA outcomes for the identification of human rights victims in Chile

Natalia Rojas Gonzalez, Sasha Voss, Marisol Intriago Levia (Editor)

Research output: Contribution to specialist publicationArticle in specialist publication

Abstract

Identifying victims of human rights violations pertaining to the dictatorship in Chile is essential for the pursuit of truth, justice and reparation. The Human Rights Unit in Servicio Médico Legal from Chile, uses DNA analysis of bone samples to identify human rights victims from this period. An evaluation of data related to each case was conducted to assess the influence of variables on identification outcomes (number of short tandem repeats amplified or STR). Six factors were analysed statistically: the post-mortem interval (PMI), the geographic zone of the sample’s exhumation, the victim’s age at death, preservation of the bone sample, the type of bone, and the sample’s weight. The main aim was to determine the most appropriate conditions to optimise DNA outcomes. The results indicated a significant difference in the number of STR amplified within groups for PMI ((H2,393=46.28, p<0.05), the geographic zone of exhumation (H2,393=51.45, p<0.05), bone preservation (H2,393=6.30, p<0,05) and type of bone analysed (H13,382=32.86, p<0,05). Attempts to model the relationship between factors and DNA outcomes using stepwise linear regression analysis of 396 samples indicate that PMI is significantly related to the amount of DNA amplified (F1,394=34.95, p<0.05), as is the combination of PMI and bone preservation (F2,393=19.61, p<0.05). These two factors accounted for 86% of the variation observed in DNA outcomes. Conclusively, samples from bones with longer PMI and ‘poor’ preservation result in lower DNA amplified than samples extracted from shorter PMIs with ‘good preservation.
Translated title of the contributionEvaluating DNA outcomes for the identification of human rights victims in Chile
Original languageSpanish
Pages17-25
Number of pages9
Specialist publicationIX Revista de Investigación Forense
Publication statusPublished - 2021

Fingerprint

Dive into the research topics of 'Evaluating DNA outcomes for the identification of human rights victims in Chile'. Together they form a unique fingerprint.

Cite this