A Study to Establish the Sequence of Intersecting Strokes Using Infrared Luminescence

Abstract

Forensic document examiners come across various documents whose authorship is a matter of controversy. Forgers are using printing devices to produce fabricated documents. Genuine documents may also contain alterations such as additions, interlineations, obliterations, etc. This may put a question on the authenticity and authorship of that document. Establishing the chronology of printing and signing is an important task. In this study, the chronological order of intersections between various printed or typewritten strokes and different writing instrument ink strokes has been determined. In this study, 8640 samples were prepared, of which, 4320 samples were printed after writing and the rest 4320 samples were printed before writing. The samples were analyzed under Infrared light using Projectina® DocuCentre Expert. A blind test was performed to verify the results. The technique gave helpful results for a few combinations.

Keywords

• Forensic Science
• Questioned Documents
• Sequence of Strokes
• Infrared Luminescence
• Projectina® DocuCentre Expert

Kızılötesi Işın Tekniği Kullanarak Çakışan Kalem Hatlarının Uygulama Sırasının Tespitine Yönelik Bir Çalışma

Abstract

Adli belge inceleme görevlileri, yazarlığı tartışmalı olan çeşitli belgelerle karşılaşırlar. Sahtekarlar, uydurma belgeler üretmek için baskı cihazları kullanıyor. Orijinal belgeler ayrıca eklemeler, ara satırlar, silintiler vb. değişiklikler içerebilir. Bu, o belgenin orijinalliği ve yazarlığı hakkında şüphe uyandırabilir. Basım ve imza kronolojisini oluşturmak önemli bir görevdir. Bu çalışmada, çeşitli basılı veya daktiloyla yazılmış darbeler ile farklı yazı gereci mürekkep darbeleri arasındaki kesişmelerin kronolojik sırası belirlenmiştir. Bu çalışmada 8640 numune hazırlanmış olup, bunların 4320 adedi yazı yazıldıktan sonra, kalan 4320 numune ise yazı yazılmadan önce basılmıştır. Numuneler, Projectina® DocuCentre Expert kullanılarak Kızılötesi ışık altında analiz edildi. Sonuçları doğrulamak için kör bir test yapıldı. Teknik, birkaç kombinasyon için yararlı sonuçlar verdi.

Keywords

• Adli Tıp
• Sorgulanan Belgeler
• Vuruş Sırası
• Kızılötesi Lüminesans
• Projectina® DocuCentre Expert

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