The bloodstain is not only the murder case scene trace, is also matter witness, and has the important crime evidence value and the appraisal function.
血迹既是杀人案件现场的痕迹，又是物证，具有非常重要的犯罪证据价值和鉴定作用。
The bloodstain is not only the murder case scene trace, is also matter witness, and has the important crime evidence value and the appraisal function.
血迹既是杀人案件现场的痕迹，又是物证，具有非常重要的犯罪证据价值和鉴定作用。
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