DNA 정보 활용을 통한 귀화인 살인사건의 분석과 적용
The First Case Report on the Identification of a Naturalized Citizen Murderer through the Utilization of DNA Database Information
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본 사례연구는 서울지역에서 발생하였던 귀화인에 의한 살인사건에 대하여 세계적인 법과학DNA 정보의 적용에 관한 사례 보고이다. 2012년 8월 한 할머니가 불상자에 의해 성폭행된 후, 목이 졸려 사망하였다. 할머니의 시신은 자신의 집에서 발견되었고, 살인범에 대한 정보는 거의 얻을 수 없었다. 부검과 현장 감식에서 질액, 타액, 손톱 및 혈흔이 확보되었고, 이들 증거물에 대하여 세 가지 법과학 DNA 분석(상염색체, Y 염색체 STR 및 미토콘드리아 DNA)을 시행하였다. 분석된 DNA 프로필은 세계적 법과학 DNA 정보와 비교하여 한국인과는 다른 특성을 나타내었으며 분석결과를 토대로 살인범은 남아시아인일 가능성이 있음을 추정하였다. 분석된 정보는 담당 수사기관에 통보하였으며 실제 살인용의자는 검거되었다. 검거된 살인용의자와 현장 증거물의 DNA 프로필 일치확률은 5.28 × 10−16로 계산되었다. 민족 간의 비교를 위해 활용 가능한 세계적인 법과학 DNA 정보는 향후 법과학 분야에 매우 유용할 수 있음을 확인 할 수 있었다
Abstract
We report here the application of the worldwide forensic DNA information database search in the murder case by a naturalized citizen, which occurred in Northern District of Seoul. At August 2012, an old lady was sexually assaulted and strangled by an unknown murderer. The dead body of an old lady was found in her house. Information of the murderer was insufficient. DNA samples of a murderer were obtained from the corpse and crime scene while performing medicolegal autopsy and on-site investigation. The DNA samples including vaginal fluid, saliva, fingernail debris and bloodstain were analyzed with three forensic DNA methods (autosomal STR, Y- STR haplotypes, and mitochondrial DNA). We found the different genetic characteristics from Koreans in the worldwide forensic DNA information database. We suggested that the actual criminal could be a man closely related to the South Asian population. After few days, this information was sent to the police and DNA sample of the murderer was obtained after his arrest. DNA profile was exactly matched with those in the crime scene samples. The frequency of the CODIS DNA profile identified was estimated to be 5.28 × 10-16 in a Bangladeshi population. Our experience shows that the worldwide forensic DNA information database search may be a useful method to detect a real offender by facilitating the comparison on Koreans and other populations.
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