Latent Fingerprints Development on Various Substrates Using SPR and Unconventional Powders
Authors: Dr. Richa Rohatgi, G. Sai Uhasinia and Nancy Yadava, Assistant Professor and Post-Graduate Students, Amity School of Applied Sciences, Amity University, Haryana, India
Locating a visible print or a plastic impression at the scene of the crime is conveniently easier than to locate a latent print which requires utilization of different techniques for development and enhancement. For this reason, different physical and chemical methods have been accounted in the past, for developing latent fingerprints on various surfaces. In the present study, we have tried to develop latent fingermarks with commonly encountered household powders which possess no significant health hazards and are low in toxicity in comparison to the conventional fingerprint powders which are highly toxic, very expensive and require a trained expert. This work is an extension of a previously conducted preliminary research to develop latent fingerprints using unconventional household kitchen food products (in powder form mostly) on non-porous surfaces alone. This study is an attempt to develop latent fingermarks on various porous and non-porous substrates using unconventional household powders which are simple to use, easily available in indoor crime scenes, possess no harmful side-effects and costs way less than other chemical fingerprint powders.
Keywords: Latent, fingerprints, impressions, non-porous, porous surfaces, unconventional powders, household powders.
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