earticle

영어

This report shows the process of applying and utilizing forensic DNA information in the capture of a serial rapist. During the period from 2005 to 2009, a serial rapist from the Western region (Gyeonggi Province) committed at least 5 rapes. An unknown offender sexually assaulted women in their homes. Information on the identity of the offender was insufficient at that time. The DNA profile of an offender was obtained from the victims’bodies and the crime scenes themselves in the course of the on-site investigation. The DNA samples obtained from the crime scenes were analyzed with three forensic DNA methods (autosomal STR, Y-STR haplotypes, and mitochondrial DNA). A serial rapist’s crime scene(s) show some similar components vis-a-vis geographical viewpoint and behavioral characteristics. Two suspects (the convicted person and a serial rapist) had identical Y-STRs haplotypes in 17 Y chromosome STR loci and possessed common alleles in 15 out of 15 autosomal loci. We hypothesized that this suspect could be a man closely related to the rapist. In societies (such as Korea), which use patrilineal surnames a correlation of the Y-STR haplotypes are expected. This information was sent to the police after analysis and the DNA sample of the offender was obtained after his arrest. The suspect’s DNA profile was an exact match to those in the crime scene samples. The frequency of the CODIS DNA profile identified was estimated to be 5.28 × 1016 in the Korean population. The comprehensive application of forensic DNA analysis and criminal profiling can be used to identify and trace criminals in forensic investigations on a much larger scale than has been done to date.

한국어

본 사례연구는 경기 서부지역에서 발생한 미제 연쇄성폭행 사건의 해결과정에 대한 사례 보고 이다. 강력하고 효과적인 법과학 DNA 정보의 활용과 수사과학의 접목을 통한 접근으로 미제 강력사건을 신속하게 해결하게 하였다. 상염색체와 Y 염색체 STR 유전자 좌위 분석 및 미토콘드리아 DNA 분석은 동일부계 및 모계에 대한 정보를 제공한다. 또한, 수사과학적 접근방법으로 행동적, 지리적 분석은 용의자의 성향 및 거주지 추정을 용이하게 할 수 있다. 과학수사 DNA 분석을 통하여 경기지역 미해결 연쇄성폭행 사건의 용의자는 과거 검거된 충청지역 연쇄성폭행범과 유전학적으로 매우 근친관계가 있음을 확인하였고, 추가적인 수사과학적 방법을 활용하여 실제 범인이 검거되었다. 이는 과학수사 분야에 중요한 결과물로서 향후 미제사건 해결을 위하여 수사과학 분야에 중요한 참고자료가 될 것이다.