Activities Designed for Fingerprint Dusting and the Chemical Revelation of Latent Fingerprints

Abstract

This article describes two different latent fingerprint revelation activities that have similar organization structures and pedagogy methodologies. The two activities feature the use of multiple stations to allow students to test, compare, and contrast different fingerprint revelation techniques. Both activities adopt a structured-inquiry pedagogical methodology that invites students to form their own opinions on the strengths and weaknesses of each technique. Fingerprint dusting techniques are more accessible because there is less need for fume hoods and protective safety equipment. The chemical revelation of latent prints techniques are more suited for a laboratory environment where fume hoods and protective safety equipment are available.

Hierarchical Activities Designed for High-Resolution Visualization and Quantitative Analysis of Fingerprint Sweat Pores

“…Generally, fingerprints at crime scenes are often invisible to naked eyes and thus need to be visualized. , Currently, a series of enhancement methods have been developed and evolved into courses, focusing on visualizing the level 1–2 details. − Several articles have already been published in this Journal concerning traditional LFP enhancement activities and experiments such as ninhydrin, silver nitrate, iodine fuming, powder dusting, etc. − In practice, the students are mainly taught the mentioned revelation and extraction methods of level 1–2 features. Imagine a case where a fingerprint encountered at a crime scene has insufficient level 1–2 characteristics; students will not know how to handle it effectively if they do not receive any training for visualization of level 3 features.…”

Surface Chemistry Provoked Strategy to Develop Sustainable Latent Fingerprints Visualization and Multiple Anti-Counterfeiting Trajectory: Aggregation-Induced Emission Mechanism Based Active Conjugated Imidazole Luminogens

“…For instance, Draper et al 18 proposed a simple method to encode ngerprint biometrics securely for long storage, but fails in system security as well as the detailed authentication. In addition, many research communities are seriously attempted on cryptographic aspects of the problem [19][20][21] . Aforementioned techniques, encoded FPs have also stored digitally, which can be subsequently manipulated 22 .…”

Recent Trends in Fluorescent Organic Materials for Latent Fingerprint Imaging

“…As latent fingerprint may exist everywhere at the crime scene and the visualization technology requires high quality and speed to identify individuals in forensic sciences, the visible detection of the LFPs on different surfaces have been explored through a variety of spectroscopy methods, also called LFPs imaging, visualization, detection, or developing methods. The most commonly used procedures for developing LFPs are powder-dusting and spraying methods in both forensic practice and research field, and the developed images are stored as evidences, so colored dusting powders have attracted much attention from related research community (Cadd et al, 2015 ; Friesen, 2015 ; Huynh and Halámek, 2016 ). The powder-dusting method relies on the adherence of powder particles to the fingerprint deposits, forming patterns of ridges, and furrows for fingerprint identification.…”