Development of latent fingermarks by electrochemical deposition of nickel on brass surfaces
Abstract
Introduction/purpose of the research: Latent fingermarks can be found on the crime scene on various surfaces and made visible by different forensic methods. As this evidence can often be found on brass surfaces (ammunition casings, decorative items, etc.) the paper discusses the possibilities of applying electrochemical deposition of nickel on brass. The condition for the application of this technique is the existence of a conductive substrate. Fatty components of latent fingermarks have insulating properties and prevent the electrodeposition process.
Methods: Experimental thin rectangular pieces of brass foil were used as substrates for latent fingermarks. Samples were degreased in acetone and ethyl alcohol, rinsed in deionized water, and dried in a stream of compressed air before leaving the fingermarks. To enhance the presence of sweat on friction ridges, the hand was placed in the silicone glove for five minutes. A slight touch of the index finger was left on the tiles. Fingermarks were developed on brass samples by fingerprint powder and the electrochemical deposition of nickel on another brass surface simultaneously. In order to obtain the best possible evidence, the parameters affecting the deposition rate (current density, deposition time) were changed until a clear fingermark was obtained.
Results: The fingermarks were compared visually using a magnifying glass with illumination to observe the contrast between the papillary lines and the interpapillary space and the characteristic details (minutiae). The optimal results were achieved with the current density (deposition rate) of 50mA/cm2 for 10s.
Conclusion: Electrochemical deposition of nickel on brass is an applicable technique for developing latent fingermarks with certain limitations.
References
Bécue, А. & Champod, C. 2023. Interpol review of fingermarks and other body impressions (2019 – 2022). Forensic Science International: Synergy, 6, pp.1-35. Available at: https://doi.org/10.1016/j.fsisyn.2022.100304.
Bjelovuk, I. 2022. Кriminalistička tehnika. Belgrade, Serbia: University of Criminalistic and Police Studies (in Serbian). ISBN: 978-86-7020-479-9.
Bjelovuk, I., Lamovec, J. & Vasović, R. 2023. Visualization of latent fingermarks on copper surfaces by metal deposition. Bezbednost, in press (in Serbian).
Cutler, C.P., Coates, G.E. & Jenkinson, D.C. 2012. Nickel in stainless steels. Zavarivanje i zavarene konstrukcije, 57(2), pp.73-77 [online]. Available at: https://scindeks.ceon.rs/article.aspx?artid=0354-79651202073C&lang=en (in Serbian) [Accessed: 26 November 2023].
Jasuja, O. P., Singh, G. & Almog, J. 2011. Development of latent fingermarks by aqueous electrolytes. Forensic Science International, 207(1-3), pp.215-222. Available at: https://doi.org/10.1016/j.forsciint.2010.10.011.
Kesić, T., Bjelovuk, I. & Marinković, D. 2020. Evidentiary significance of fingerprints. In: Ilik, G. & Stanojska, A. (Eds.) International Scientific Conference “Towards a Better Future: Human Rights, Organized crime and Digital society”, Conference Proceedings, Vol. I, Kicevo: Faculty of Law; Bitola: University “St. Kliment Ohridski”, North Macedonia, pp.88-97, October 3 [online]. Available at: https://eprints.uklo.edu.mk/id/eprint/5885/1/KICEVO_2020.pdf [Accessed: 26 November 2023]. ISBN: 978-608-4670-14-8 (V.1). ISBN: 978-608-4670-15-5 (V.2).
Qin, G., Zhang, M., Zhang, Y., Zhu, Y., Liu, S., Wu, W. & Zhang, X. 2013. Visualizing latent fingerprints by electrodeposition of metal nanoparticles. Journal of Electroanalytical Chemistry, 693, pp.122-126. Available at: https://doi.org/10.1016/j.jelechem.2013.01.016.
-Symetric.co.uk. 2016. The mass of over 30 different metals and alloys online]. Available at: https://www.simetric.co.uk/si_metals.htm [Accessed: 26 November 2023].
Tutulugdžija, A., Radovanović, R. & Lamovec, J. 2017. Visualization of latent fingerprints by electrochemical deposition of metallic thin films. In: International scientific conference “Archibald Reiss days” Thematic conference proceedings of international significance, Vol. III, Belgrade: Academy od Criminalistics and Police Studies, pp.321-328. November 7-9 [online]. Available at: https://jakov.kpu.edu.rs/bitstream/handle/123456789/905/Rajs_2017_Tom_3.pdf?sequence=1&isAllowed=y [Accessed: 26 November 2023]. ISBN: 978-86-7020-387-7.
Yao, K-M., Xu, M., Huang, X-Z, Mo, D-C. & Lyu, S-S. 2023. Electrochemical deposition of copper films to develop the latent sebaceous fingerprints on metal substrates. Journal of Electroanalytical Chemistry, 941, art.number:117526. Available at: https://doi.org/10.1016/j.jelechem.2023.117526.
Yuan, C., Li, M., Wang, M., Dan, Y., Lin, T., Cao, H., Zhang, M., Zhao, P. & Yang, H. 2021. Electrochemical development and enhancement of latent fingerprints on stainless steel via electrochromic effect of electrodeposited Co3O4 films. Electrochimica Acta, 370, art.number:137771. Available at: https://doi.org/10.1016/j.electacta.2021.137771.
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