장갑에서 수사관의 DNA 오염을 줄이기 위한 장갑 이중 착용(Double Gloving)의 효과성 확인
A Study on the Effect of Double Gloving Technique to Reduce DNA Contamination in Glove by Investigator
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초록
장갑을 두 장 착용하는 방법(double gloving)은 현장에서 수사관의 DNA가 증거물로 전이되는 것을 막기 위해 권고되고 있으나, 그 효과성은 아직 입증되지 않았다. 따라서 본 연구에서는 double gloving이 장갑 외피로 전이되는 착용자의 DNA를 얼마나 줄일 수 있는지 정량적으로 확인하였다. UV 형광로션을 이용하여 착용자의 피부가 장갑 외피와 접촉하는 정도를 확인하였고, DNA 정량분석과 STR 분석을 통해 착용자의 DNA가 장갑으로 오염되는 정도를 분석하였다. 그 결과, double gloving은 장갑을 한 장 착용하는 방법(single gloving)보다 장갑으로 오염되는 착용자의 DNA 양을 유의미하게 감소시킴과 동시에 착용자의 STR marker가 분석되는 양이 감소함을 확인하였다.
Abstract
Double gloving is recommended to prevent transfer of the wearer's DNA to evidence, but its effectiveness has not yet been proven. In this study, we quantitatively confirmed how much double gloving can reduce the wearer's DNA that is transferred to the glove skin. UV fluorescence lotion was used to determine the degree of contact between the wearer's skin and the glove skin, and the degree of contamination of the wearer's DNA with the glove was determined through quantitative analysis of DNA and STR analysis. As a result, double gloving significantly reduced the amount of DNA contaminated with gloves compared to single gloving and at the same time reduced the amount consistent with the wearer's STR marker.
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