Fingerprint composition and aging: A literature review

Area of Science:

• Forensic Science
• Chemistry

Background:

• Fingerprints are vital in criminal investigations, yet their chemical composition and degradation over time are poorly understood.
• Current fingerprint enhancement methods lack detailed understanding of reaction mechanisms and environmental influences.
• Determining the age of a fingerprint remains an unexplored area with significant research gaps.

Purpose of the Study:

• To review the current understanding of fingerprint chemistry, focusing on composition variations.
• To explore the impact of donor characteristics and environmental factors on fingerprint degradation.
• To propose a novel, reliable methodology for quantitatively determining fingerprint age.

Main Methods:

• Literature review of existing studies on fingerprint chemistry, enhancement, and aging.
• Analysis of qualitative and quantitative data on the effect of time on fingerprint composition.
• Examination of kinetic data and reaction mechanisms relevant to fingerprint degradation.
• Discussion of previous fingerprint aging methods, highlighting their limitations.

Main Results:

• Significant gaps exist in understanding fingerprint chemistry, enhancement mechanisms, and aging.
• Donor characteristics and environmental variables influence fingerprint composition.
• Existing methods for fingerprint age determination are unreliable and lack quantitative accuracy.

Conclusions:

• Further research is needed to elucidate fingerprint chemistry and degradation pathways.
• A quantitative approach based on kinetic changes in fingerprint composition offers a promising new method for age determination.
• Developing reliable fingerprint aging techniques will significantly benefit criminal investigations.