Forensic Analysis of Unknown Materials: a different vision of Questioned Documents

  • Ana Cristina de Almeida Assis
Keywords: Questioned documents, forensic analysis, HPLC, FTIR, SEM/EDX

Abstract

One of the biggest challenges in forensic analysis is the correct identification of unknown materials found in a crime scene or crime scene related.

Forensic document analysis comprises the characterization, identification and differentiation of various materials such as inks, paper, glues, coatings, laminates, waxes, among others for which it is necessary to use advanced analytical methodologies.

In the present study, some unknown materials were correctly identified and characterized using techniques such as Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy with Energy Dispersive X-Ray Spectroscopy (SEM / EDX) and High Performance Liquid Chromatography (HPLC), as well as the analysis of morphology and other physical and chemical characteristics inherent to the suspicious material under study.

Based on some case studies, the significant contribution of this kind of identification to the criminal investigation will be demonstrated.

Published
2018-06-01
How to Cite
de Almeida Assis, A. C. (2018). Forensic Analysis of Unknown Materials: a different vision of Questioned Documents. European Law Enforcement Research Bulletin, (17), 67-83. Retrieved from https://bulletin.cepol.europa.eu/index.php/bulletin/article/view/190

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