Fingerprint Detection: Unveiling Simple Techniques Used by Detectives (Even After Wiping)!

There’s a common movie trope of an actor wiping their fingerprints off a gun. It seems like a simple wipe with a cloth eliminates any trace of a criminal’s guilt, but that isn’t actually the case!
Scientists have developed a method that can visualize prints from even the faintest fingerprint deposits left after the metal of a gun is wiped off. This technique uses a colored-electro active film that uses fingerprint residues as a stencil for blocking the electric current. Once a voltage is passed through, the oily regions deflect the colored substances surrounding bare regions, which gives rise to a negative ridge pattern.

#fingerprint #forensics #criminalcase

References:
https://www.amazon.com/Introduction-Forensic-Chemistry-Kelly-Elkins-ebook/dp/B07H5RW5S2/ref=sr_1_1
https://www.compoundchem.com/2016/07/26/fingerprints/
https://www.amazon.com/Forensics-Anatomy-Crime-Wellcome/dp/178125169X
https://www.amazon.com/Crime-Scene-Court-Essentials-Forensic/dp/1847558828
https://pubs.rsc.org/en/content/articlelanding/2013/FD/c3fd00053b
https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1556-4029.2008.00738.x
Original Article Link: https://www.scienceabc.com/eyeopeners/can-fingerprints-be-recovered-after-theyre-wiped.html

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Видео Fingerprint Detection: Unveiling Simple Techniques Used by Detectives (Even After Wiping)! канала Science ABC