UMA SIMULAÇÃO DE CASO PARA INVESTIGAÇÃO DE VESTÍGIOS: ANÁLISE DE ADULTERANTES DE COCAÍNA EM IMPRESSÕES DIGITAIS UTILIZANDO A TÉCNICA DO PÓ E ESPECTROMETRIA DE MASSAS

A CASE SIMULATION FOR TRACE INVESTIGATION: ANALYSIS OF COCAINE ADULTERANTS IN FINGERPRINTS USING THE POWDER TECHNIQUE AND MASS SPECTROMETRY. A simulation of traces extracted from surfaces such as glass, associated with fingerprints contaminated with drug residues, was proposed in this study. For this purpose, a silicone mold was created to replicate the papillary lines present in a fingerprint. The mold was then exposed to an oily mixture of fatty acids and cocaine adulterants, such as caffeine and benzocaine, to simulate the endogenous and exogenous chemical composition of the fingerprints. The residues left on the surfaces by the fingerprints, along with the silicone mold, were extracted and their chemical components were qualitatively identified in a single chromatogram using gas chromatography-mass spectrometry (GC-MS). This approach provided a didactic opportunity to explore the chemistry behind fingerprints within the context of forensic science education.