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被拍扁在墙上的蚊子，成了犯罪现场的“目击证人”
source link: https://tech.sina.com.cn/d/f/2020-08-06/doc-iivhvpwx9477693.shtml
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来源：果壳如果对刑侦类影视节目感兴趣，你应该十分熟悉《犯罪现场调查》系列里，痕迹专家们拿着棉签在犯罪现场血迹、精斑、凶器上面“揩几揩”的场景，也知道他们是在收集人体体液，用以提取DNA锁定真凶。随着科学的发展，如今可以提取DNA用于识别罪犯
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