절도현장에서 접촉 흔 DNA를 활용한 사례
Application of Touch DNA to Investigation in Cases of Theft
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초록
접촉 흔 DNA (Touch DNA)는 사람이 물체를 접촉하거나 다룰 때 피부세포가 그 물체에 유류되어 남긴 DNA이며 최근 연구에서 개인의 유전적 profile은 접촉한 물체로부터 얻을 수 있음을 보여주었다. 본 연구는 현장에서 빈번하게 발생하는 절도사건 중 현장 유류물에서 접촉 흔 DNA를 채취하여 DNA형이 검출된 사례로 절도현장에서 접촉 흔 DNA의 범죄현장 적용 가능성 및 채취 시 고려사항에 대하여 알아보고자 하였다. 3건의 사례에서 경찰청과 검찰청에서 구축한 DNA 데이터베이스를 통하여 피의자의 인적사항을 확인하였고 2건의 사례에서 인적사항이 확인되지 않았으나 DNA형이 검출되어 추후 수사에 활용할 수 있을 것으로 생각된다. 그러나 Full DNA profiles을 성공적으로 얻기 위하여 접촉 흔 DNA 채취 시 DNA의 2차전이 오염과 DNA양에 영향을 주는 인자 및 적절한 수집과 보관방법을 고려하여야 한다.
Abstract
Touch DNA refers to the DNA that is left behind from skin cells when an object is touched or handled. Recent studies show that an individual's genetic profile can be generated from swabs taken from objects touched by hands. This study demonstrates the applicability of Touch DNA providing a tool for crime scene investigations and the need for caution when Touch DNA samples are collected at the scene of the crimes through theft cases producing an individual's genetic profile from touched items. In three of five cases, the suspects were identified through established DNA databases of DNA profiles from convicted criminals and suspects in the National Police Agency and Public Prosecutor’s Office. Although DNA typing in the rest of two cases is unable to identify a suspected person, it is expected to be useful for further investigation with DNA profiles generated. In order to obtain successful full DNA profiles, it should be considered on the potential for secondary transfer of DNA, contamination, some factors that can affect the amount of DNA and proper collection/storage of the Touch DNA items.
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