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

Year 2023, Volume: 37 Issue: 2, 56 - 64, 12.08.2023

Komal Saini Ridamjeet Kaur Vinayak Gupta Manpreet Kaur

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

References

• 1. Poulin G. Establishing the sequence of strokes: the state of the art. Int J Forensic Documents Examiners. 1996;2(1):16–32.
• 2. Godown L. Sequence of writings. J Crim Law Criminol. 1963;54(1):101–9. https://doi.org/10.2307/1141146
• 3. Mathyer J. Problem of establishing the sequence of superimposed lines-critical review of proposed techniques. Int Criminal Police Rev. 1980;35:238–50.
• 4. Radley RW. Determination of sequence of ball point pen writing utilising infrared luminescence techniques, Part 1. J Forensic Sci Soc. 1982;22:373–5. https://doi.org/10.1016/S0015-7368(82)71514-2
• 5. Howes DR. Sequence of writing-pencil and porous tip pen. In: Meeting of American Society of Questioned Examiners, Montreal, Quebec; Poulin G. Int J Forensic Doc Examiners. 1965;2(1):16–32.
• 6. Planty MG. Determining the relative chronology of intersecting ball point pen lines and laser printed document marks -Linton Godown Revisited. Int J Forensic Documents Examiners. 1997;3(1):31–4.
• 7. McKasson SC. Dequenching of infrared luminescence. Forensic Sci Int. 1987;16(2):173–6. https://doi. org/10.1016/0379-0738(80)90170-X
• 8. Bojko K, Roux C, Reedy BJ. An examination of the sequence of intersecting lines using attenuated total reflectancefourier transform infrared spectral imaging. J Forensic Sci. 2008;53(6):1458–67. https://doi.org/10.1111/j.1556- 4029.2008.00796.x
• 9. Saini K, Kaur R, Sood NC. Determining the sequence of intersecting gel pen and laser printed strokes-a comparative study. Sci Justice. 2009;49:286–91. https://doi.org/10.1016/j.scijus.2009.07.003
• 10. Kaur R, Saini K, Sood NC. Application of video spectral comparator (absorption spectra) for establishing the chronological order of intersecting printed strokes and writing pen strokes. Sci Justice. 2013;53(2):212–9. https:// doi.org/10.1016/j.scijus.2012.10.001
• 11. Kaur R, Saini K, Sood NC. Sequencing the intersections of printed strokes with writing instrument strokes using DocuCentre expert (PIA 6000-EDF). Sci Justice. 2013;53(2):206–11. https://doi.org/10.1016/j.scijus.2012.08.005
• 12. Saini K, Rathore R, Kaur R, Sharma T, Kaur S. Establishing sequence of inkjet printer, laser printer and writing ink strokes using scanning electron microscopy (SEM). Arab J Forensic Sci Forensic Med. 2019;1(10):1367–72. https://doi.org/10.26735/16586794.2019.026
• 13. Saini K, Kaur R, Sood NC. A study for establishing the sequence of superimposed lines: inkjet versus writing instruments. Forensic Sci Int. 2009;193:14–20. https://doi. org/10.1016/j.forsciint.2009.08.012
• 14. Ellen D. The scientific examination of documents: methods and techniques, London, UK: The Camelot Press; 1989. pp. 152–5.
• 15. Mann M, Pathak SR, Shukla SK. Three-dimensional detection of sequence of strokes using a confocal microscope. Egypt J Forensic Sci. 2019;12(9). https://doi.org/10.1186/s41935- 019-0120-z
• 16. Wu X, Ouyang G, Li B, Cui L, Zhou G. Determining linecrossing sequences between laser printing and writing pen using coaxial light: line-crossing sequences determination. J Forensic Sci 2020;65(4):1242–6. https://doi.org/10.1111/1556-4029.14316
• 17. Chai T, Li B. The factors influencing the identification of the chronological intersecting sequence between ink and toner. J Forensic Sci. 2021;66(6):1–9. https://doi.org/10.1111/1556-4029.14830
• 18. Kang T-Y, Lee J, Park B-W. Use of atomic force microscopy in the forensic application of chronological order of toners and stamping inks in questioned documents. Forensic Sci Int. 2016;261:26–32. https://doi.org/10.1016/j. forsciint.2016.01.033
• 19. Kim J, Kim MJ, An JW, Kim Y. Determination of the sequence of intersecting lines using focused ion beam/scanning electron microscope. J Forensic Sci. 2016;61(3):803–8. https:// doi.org/10.1111/1556-4029.13076