On Some Issues of Handprints Detection and the Mechanism of Trace Formation on Porous Surfaces

Problems of detecting sweat and grease deposits on porous surfaces are common for forensic practice, and usually, they are successfully resolved with the help of chemical methods. Meanwhile, the interaction process in the system “porous surface – deposit – chemical agent" concerning clarification and identification of the trends within chemical reaction is not reviewed in literature sufficiently. For more comprehensive research of this process, the authors of the article have conducted multiple experiments on the ninhydrin reaction with the sweat and grease of the deposits, analyzed the interaction of the chemical agent with the sweat and grease, with the properties of porous (paper) materials using electron microscopy, and also looked into the display features of pore and edgeoscopic signs in the deposits under different storage conditions.

As a result of the research, it is shown that such parameters of deposits carriers (paper) as porosity and hydrophilic properties and ambient humidity as well as the time of storage have a significant influence on the process of detecting the sweat and grease deposits on porous surfaces and their quality.

dactyloscopy, papillary patterns, sweat and grease deposits, chemical methods of detection, ninhydrin, pore and edgeoscopic signs, porous surfaces, paper

1. Druzhinin Yu.A., Matov O.R. The Capacity of the Poro- and Edgeoscopic Research When Using the Modern Means of Handprints Detection. Methodological Recommendations. Moscow: EKTs MVD Rossii, 2010. 40 p. (In Russ.)

2. Moiseeva T.F. A Comprehensive Forensic Investigation of a Person’s Sweat and Grease Deposits / N.P. Mailis (ed). Moscow: Gorodets, 2000. 223 p. (In Russ.)

3. Dontsova Yu.A., Ivashkova A.V., Ryzhova T.M., Chernitsyn L.A. Modern Methods and Means for Detection, Seizure and Investigation of Hands Deposits. Textbook. Moscow: EKTs MVD Rossii, 2010. 176 p. (In Russ.)

4. Afanas’ev I.B., Druzhinin Yu.A., Yudina T.Yu., Vasil’ev V.A., Ermakova T.A., Zaporotskova I.V., Rusanov E.Yu. On Some Issues of the Mechanism of Deposits Formation for Latent Hands Deposits on Porous Surfaces. “Forensic Expertise: Russian and International Experience”. Materials of the 3 rd International Scientific and Practical Conference (Volgograd, April 27–28, 2016). Volgograd: VA MVD Rossii, 2016. P. 117–122. (In Russ.)

5. Greg S., Sing K. Adsorption, Specific Surface, Porosity / Translation from English by V.A. El’tekov and Yu.A. El’tekov; K.V. Chmutov (ed). Moscow: Mir, 1970. 407 p. (In Russ.)

6. Ivanov S.N. Technology of Paper. 3 rd ed. Moscow: Shkola bumagi, 2006. 696 p. (In Russ.)

7. Menzel E.R. Recent Advances in Photoluminescence Detection of Fingerprints. The Scientific World Journal. 2001. Vol. 1. P. 498–509. https://doi.org/10.1100/tsw.2001.76

8. Liang S., Cui S., Wang G., Zhou Y. Synthesis of Benzimidazole Sweat Fingerprint Fluorescent Developer and Fluorescent Effect. Chemical Engineering Transactions. 2018. Vol. 66. P. 157–162. https://doi.org/10.3303/CET1866027

9. Almog J., Levinton-Shamuilov G., Cohen Y., Azoury M. Fingerprint Reagents with Dual Action: Color and Fluorescence. Journal of Forensic Sciences. 2007. Vol. 52. No. 2. P. 330–334. https://doi.org/10.1111/j.15564029.2007.00383.x

10. Jelly R., Patton E.L., Lennard C, Lewis S.W., Lim K.F. The Detection of Latent Fingermarks on Porous Surfaces Using Amino Acid Sensitive Reagents: A Review. Analitica Chimica Acta. 2009. Vol. 652. No. 1–2. P. 128–142. https://doi.org/10.1016/j.aca.2009.06.023

11. Yakubke Kh.-D., Eshkait Kh. Amino Acids. Peptides. Proteins / Translation from German. N.P. Zapevalova and E.E. Maksimov; Yu.V. Mitin (ed). Moscow: Mir, 1985. 455 p. (In Russ.)

12. Simonyan A.V., Salamatov A.A., Pokrovskaya Yu.S., Avanesyan A.A. Using Ninhydrine Reaction for Quantifying α-Amino Acids in Different Objects. Methodical Recommendations. Volgograd: VolgGMU. 2007. 106 p. (In Russ.)

13. Hansen D.B., Joullie M.M. The Development of Novel Ninhydrin Analogues. Chemical Society Reviews. 2005. Vol. 34. No. 5. P. 408–417. https://doi.org/10.1039/b315496n

14. Petraco N.D.K., Proni G., Jackiw J.J., Sapse A.-M. Amino Acid Alanine Reactivity with the Fingerprint Reagent Ninhydrin. A Detailed Ab Initio Computational Study. Journal of Forensic Sciences. 2006. Vol. 51. No. 6. P. 1267–1275. https://doi.org/10.1111/j.15564029.2006.00271.x

15. Almog J., Azoury M., Elmaliah Y., Berenstein L., Zaban A. Fingerprint’s Third Dimension: The Depth and Shape of Fingerprints Penetration into Paper – Cross Section Examination by Fluorescence Microscopy. Journal of Forensic Sciences. 2004. Vol. 49. No. 5. P. 1–5. https://doi.org/10.1520/JFS2004009