塑料物证快速检验在爆炸和放火现场勘验中的应用

Applying Rapid Detection of Probative Plastic into Scene Investigation of Explosion and Fire

塑料是生活中极为常见的材料,常遗留在爆炸和放火案件现场,作为物证或可揭示现场相关信息。本文介绍了三起爆炸和放火案件,在这些案件中勘验人员利用红外光谱和拉曼光谱快检技术对现场塑料物证进行检验,在现场快速确定了塑料物证的材质。结果表明,塑料物证现场快速检验,能通过关联现场塑料物证和现场原有塑料物品,帮助勘验人员排除现场无关物品对勘验工作的干扰,开展现场勘验和分析重建,进行涉案人员的动作行为和活动轨迹刻画。最后,本文从实战角度,结合上述案例应用情况,总结了塑料物证快速检验在爆炸和放火案件现场勘验中的应用价值和局限性。

Plastic,the common material in human life,often has its pieces remained in the scene of explosion and fi re cases,therefore ca pable of indicating relevant information about the scene and incident.Here,three cases of explosion and arson were narrated on the probative plastics applied as evidence through their identifi cation at crime scene with rapid detections of infrared spectroscopy and Raman spectroscopy.Such the applications show that fast identification of the evidential plastics has revealed the connection between the detected plastic and the scene-originated plastic objects,therewith surpassing the interference from irrelevant objects,having brought assistance to the investigation and reconstruction of the crime scene in relation to the analysis and depiction of the case-involving individuals’whereabouts.From the perspective for police to investigate the explosion and fi re scene,the practical application value was thereby concluded for the promotion of rapid detection techniques into analysis of probative plastic,with the limitations being discussed,too.