Abstract
The science of fingerprints is very crucial in criminal investigation as it helps identify perpetrators or victims of a crime. Fingerprint ridge density (FPRD), which refers to the number of ridges within a specific area on the epidermal skin layer of the distal phalanges in humans, has been found to differ between males and females. This study attempts to estimate the sex from FPRD and evaluates the diversity in FPRD across several topological areas. The study involves 208 participants (120 males, 88 females) between the ages 18 to 25 years from a North-west Indian population. Fingerprints were collected, and FPRD was accessed in radial, ulnar, and proximal areas as recommended by Gutierrez-Redomero et al. (Forensic Sci Int 180(1):17–22, 2008). FPRD has been quantified using the techniques described by Acree (Forensic Sci Int 102(1):35–44, 1999). When evaluating FPRD in the lateral pocket loops and twin loops, the proximal-side core was considered. The study reveals that males have a mean fingerprint ridge density of 12.82 ridges/25 mm2 while females have 13.01 ridges/25 mm2. Females have higher fingerprint ridge density solely in the proximal area; males have higher fingerprint ridge density in both radial and ulnar areas. In conclusion, this research underscores the potential of fingerprint ridge density as a parameter for investigating population variations and individual identification. Future studies on fingerprint ridge density in India’s diverse population will help establish reference ranges, allowing for sex and likely population group estimation, making it a valuable tool for preliminary examinations and exclusion criteria for sex estimation in crime scene investigations.
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Acknowledgements
We are also grateful to the participants, who volunteered for the study.
Funding
KK is supported by UGC Centre of Advanced Study in Anthropology (CAS II), awarded to the Department of Anthropology, Panjab University, Chandigarh, India. NC is thankful to the NFSC, Ministry of Social Justice and Empowerment, Government of India, for funding the Ph.D. in the form of a research fellowship. RM is thankful to the NFST, Ministry of Tribal Affairs, Government of India, for funding the Ph.D. in the form of a research fellowship. AG is thankful to Department of Science and Technology (DST), Government of India, for awarding INSPIRE Fellowship under grant number IF190719 for pursuing Ph.D. AR is grateful to Panjab University Chandigarh, India, for providing the fellowship in the form of a Panjab University Research Scholarship for pursuing PhD.
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Das, D., Seal, S., Pal, S. et al. Sexual dimorphism and topological variability in fingerprint ridge density in a north-west Indian population. Sci Nat 111, 23 (2024). https://doi.org/10.1007/s00114-024-01911-x
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DOI: https://doi.org/10.1007/s00114-024-01911-x