Tool mark Impressions 工具痕迹.ppt

Tool mark Impressions工具痕迹,Tool mark impressions can usually be found at the point of entry. Tool marks are unique and can be individualized.工具痕迹往往在现场入口处，它是唯一的，并具有个性化特征。,KNOWN已知,CASTING拓模所得,If a tool mark is located it should be photographed with and without a scale. The impression should be cast with a silicone based casting material such as Mikrosil. After casting the cast should be affixed to a card with identifying information and submitted to the lab.定位好了工具痕迹，就可以使用比例标尺牌照固定。这类工具痕迹可以使用硅胶拓模，把痕迹模型与鉴别卡片相匹配送往犯罪实验室进行甄别。,Casting the tool mark impression is the same as casting a fingerprint.,Suspect tools should be submitted to the lab for comparison.,Impression Evidence Practical Exercises,模拟画像确定犯罪嫌疑人,国外的嫌疑画像,中国民警姚殿义的嫌疑画像,