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在农村,类如毁青、刮树皮等破坏案件相当普遍,现场勘查中,犯罪分子作案的工具痕迹较容易发现和提取,而嫌疑人工具痕迹样本制作往往因取材的质量、坚硬程度、使用角度方法等原因难以达到理想的效果,尤其是案件经过一段时间后,样本检材更难找到。笔者在实践中发现:利用石膏灌注来制作工具痕迹样本效果好。具体方法是:用提取脚印的石膏灌注一个长若干厘米(一般为30厘米为宜)宽厚为10厘米的长方体石膏样本,其形状、大小等根据需要而定),待凝固后用水洗涮净,断其一面使其光滑细腻,用嫌疑人的工具从不同的角度变化使用,这样就能留下清晰理想的工具痕迹,尔后与现场痕迹比对或拍照,反差均好。
In rural areas, such as destroying the green, scraping the bark and other damage cases are quite common, on-site exploration, criminals tools traces of crime easier to find and extract, and the suspect tool traces sample often due to the quality, hardness, use Angle method and other reasons difficult to achieve the desired effect, especially after a period of time, the sample is more difficult to find samples. The author found in practice: the use of gypsum perfusion tool traces sample production is good. The specific method is: with the extraction of footprints gypsum perfusion of a long cm (usually 30 cm is appropriate) generous cuboid gypsum samples 10 cm, its shape, size, etc. may be required), to be solidified after rinse with water, Broke its smooth and delicate side, with the suspect’s tools from different angles change the use, so that you can leave a clear and ideal tool marks, and later compared with the scene marks or take pictures, the contrast is good.