潮湿客体表面潜在手印显现方法综述

A Review of Visualization Technologies for Developping Latent Fingerprints on Wet Surfaces

手印能够认定人身同一,在侦查破案和审判起诉中发挥着重要作用。在犯罪现场中,手印承痕客体若处于潮湿环境或被水浸泡后,遗留在其表面的手印物质中的水溶性成分会逐渐消失,常规的显现方法如“502”胶熏显法、茚三酮显现法等不再适用,因此,针对潮湿客体表面的潜在手印的显现一直是研究难点。综述了潮湿客体表面潜在手印显现方法及其优缺点,分析了现有显现方法的局限及发展方向,为其进一步研究提供理论依据。

Fingermarks can be used to identify individuals and play an important role in forensic investigation and prosecution.In crime scenes,if the surface is or has been wet,then the water-soluble component of the latent deposit will no longer be available for fingermark detection.Hence the application of conventional techniques for fingermark detection and enhancement such as cyanoacrylate fuming,or ninhydrin would serve no purpose.Therefore,developing latent fingermarks on wet surfaces has always been a challenge.This paper reviews the advantages and disadvantages of latent fingermark development methods on wet surfaces such as small particle reagent,physical developer,multi-metal deposition,single metal deposition,Oil Red O,as well as nile red,analyzes the limitations and development directions,which provides a theoretical basis for further research.