접촉 증거물의 표면 형태, 채취 횟수 및 피부에 따른 디엔에이 정량과 디엔에이형 분석

The cell containing the DNA are present on the surface of the object by direct or indirect transfer. Among the contact evidences commissioned at the crime scene, knives and scissors account for about 25% of the main items and are important evidence to be a clue to the resolution of cases in violent crime. In this experiment, we selected knives among touch evidences analyzed the knife of handle surface, the number of collection times and the skin analysis of DNA quantity and DNA typing with the three crime scene evidence. Experimental results showed that high DNA quantity and DNA typing were detected in wood handle compared to plastic handle, and DNA typing analysis was possible even when the number of sampling was repeated. In the analysis of DNA quantity and DNA typing the skin according to the experimenter, there was a difference in detection according to the experimenter and the crime scene evidence also showed a similar tendency to this experiment.