YAPIŞKAN BANTLARDA GİZLİ PARMAK İZLERİNİN GELİŞTİRİLMESİ
Özet
In forensic science, fingerprints are considered one of the most reliable forms of physical
evidence for identification and criminal investigations. Particularly, making fingerprints
visible on adhesive surfaces is defined as a challenging process due to the sticky nature
of these surfaces. In this thesis, the effectiveness of the solutions of two new materials
was evaluated on different types of adhesive tapes to develop latent fingerprints on
adhesive surfaces. In the experimental studies, the capacity of the materials to enhance
and preserve fingerprints was analyzed in detail, and the effects of the time elapsed since
the fingerprint was deposited on the quality of the print were determined.
The first material used in this thesis is fluorescent carbon dots (Material-I), while the
second material is an organic molecule with fluorescent properties, 5-chloro-2-(2'-
hydroxyphenyl) benzothiazole (Material-II). As adhesive tapes, various types commonly
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encountered in forensic cases were selected, including insulating electrical tape in
different colors, transparent packing tape, paper tape, and red silicone tape. The best
results with Material-I were obtained on black insulating electrical tape, red silicone tape,
and transparent packing tape. Similarly, the best results with Material-II were achieved
on black and blue insulating electrical tapes and red silicone tape. It was observed that
both materials were more effective in visualizing latent fingerprints on dark-colored tapes
compared to light-colored tapes. After the application of the materials, the fingerprints
that yielded successful results on the surfaces were tested using the Automated
Fingerprint Identification System (AFIS) employed in the Gendarmerie Criminal
Laboratories to determine their suitability for practical applications. The system
successfully identified the individual who left the fingerprint.
