June 10 — According to recent foreign media reports, a major breakthrough has been made in fingerprint identification technology. Dutch scientists have discovered that by analyzing the chemical composition of fingerprints, it is now possible to estimate how long ago the fingerprint was left behind.
This development could significantly impact forensic investigations. While fingerprints have long been used as a primary method for identifying individuals, current techniques have not been able to determine the exact time when a fingerprint was deposited. Now, with this new approach, investigators may be able to pinpoint the timeline of events at a crime scene.
Fingerprints are primarily composed of sweat, oils, cholesterol, amino acids, and proteins. Over time, these substances degrade, and their proportions change. By measuring these changes, scientists can estimate the age of a fingerprint. This could help determine whether a suspect was present at the scene during a specific time period.
Dipuy, a fingerprint researcher from the Dutch Forensic Science Institute, explained that this technique could be crucial in criminal cases. For example, if a fingerprint found at a burglary scene belongs to a neighbor, knowing when it was left could help distinguish between a suspect and an innocent person.
Temperature also plays a key role in the degradation process. The rate at which chemicals in a fingerprint break down depends on environmental conditions. Therefore, forensic experts must consider temperature when analyzing a fingerprint's age.
According to Dipuy, the new method allows for accurate identification of fingerprints that are up to 15 days old. Previously, scientists had attempted to analyze individual chemicals in fingerprints but failed to achieve reliable results. This new technique focuses on the overall chemical balance rather than just single components.
Looking ahead, the researchers plan to apply this technology in real-world crime scenes and build a comprehensive database. They hope that within the next year, the method will be recognized as admissible evidence in court.
This advancement represents a significant step forward in forensic science, offering a more precise way to understand the timeline of events at crime scenes.
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