Research progress in techniques for blood fingermark detection
Blood fingermarks,as a common piece of evidence at crime scenes,play an important role in personal recognition,crime scene reconstruction,and criminal investigation.In recent years,with the deep integration of blood fingermark detection and new reagents,advanced materials,modem analytical methods,and immunological techniques,the sensitivity,specificity,contrast,and applicability of blood fingermark detection have continuously improved.Moreover,greater breakthroughs have been made in the analysis of endogenous and exogenous fingermark components,the compatibility of touch DNA,and the identification of fingermark aging time.This paper outlines the research progress in blood fingermark detection technology both domestically and internationally,which includes not only traditional chemical reagents based on the mechanism of haem catalysis,protein staining and amino acid reaction,but also emerging methods based on novel materials and devices.A brief analysis of the advantages and disadvantages of each method is discussed,and finally,a prospective outlook is presented on the challenges and future prospects of existing techniques,aiming to offer guidance for scholars and practitioners in forensic science.
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