British scientists have recently invented a new fingerprint detection technology that can be re-extracted even if the fingerprint of the suspect left at the crime scene disappears.
In general, extracting the fingerprints of criminal suspects on the scene is a crucial part of the decision to solve the case. However, in many cases, it is difficult for judicial investigators to obtain the fingerprints they need, such as at the scene after the bomb explosion, or in the face of a bullet shell that has been fired. The fingerprints of the scene have disappeared after passing the high temperature. .
Similar problems can be solved with the new technology invented by scientists at the University of Wales in the UK. Experts said that the fingerprints left by criminal suspects on the surface of objects usually contain a variety of chemical substances secreted by the body surface, including proteins, fatty acids and salt. In the case of high temperature explosion, proteins and fatty acids will be difficult to survive. However, since the chemical nature of the salt is highly stable and difficult to decompose, it can be preserved. They use the instrument to scan the salt remaining on the surface of the object and input the data into computer software for analysis. With this method, the face of the original fingerprint can be restored with great precision.
With this new approach, the ability of judicial investigators to obtain fingerprints on-site is naturally much greater than ever.
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