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Review Articles

Recent Advances in Enhancement Techniques for Blood Fingerprints

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Pages 442-461 | Published online: 31 Aug 2022
 

Abstract

The blood fingerprint enhancement is not so eye-catching as latent fingerprint development in forensic community, but it is indeed an important piece of evidence for personal identification, forensic analysis and even reconstruction of crime scenes. In over past ten years, novel reagents, advanced materials and emerging techniques have growingly participated in blood fingerprint enhancement, which not only leads to a higher level of developing sensitivity, selectivity and contrast, but also endows blood impressions with more forensic significance. This review summarizes recent advances in conventional chemical reagents targeting at heme, protein and amino acid as well as emerging enhancement techniques based on advanced materials, new equipment or methods. Some critical issues in forensic science are also discussed, including partial blood fingerprint enhancement, false positive of developing reagents, the compatibility of blood enhancement technique and DNA, fingerprint age determination, and so on. Finally, we have proposed several urgent problems to be solved and the prospects of some promising techniques were proposed in the field of blood fingerprint enhancement in future work.

Additional information

Funding

The authors acknowledge the financial support of Chongqing Natural Science Foundation (cstc2021jcyj-msxmX0713), Chongqing Education Commission (KJZD-M202000301), Innovation Research Group Project of Universities in Chongqing (CXQT21033), and Southwest University of Political Science and Law (2021XZNDJDYB-07, 2021XZXS-137).

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