Fingerprint Detection: Unveiling Simple Techniques Used by Detectives (Even After Wiping)!
Science ABC
Aug 23, 2022 14:33
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Can criminals really just wipe their fingerprints off a gun? NOT anymore! In this video, we reveal the fascinating forensic science techniques detectives use to detect fingerprints — even after wiping. From classic dusting powders to cutting-edge vacuum metal deposition (VMD), fingerprint detection has come a long way.
Learn about the three types of fingerprints (patent, plastic, and latent), the Exchange Principle, how ninhydrin and super glue fuming work, and why bullet casings can reveal who handled them even after firing.
📚 Topics Covered:
- Why every person has unique fingerprints (even identical twins!)
- How fingerprints are left behind: sebaceous gland secretions
- Locard's Exchange Principle
- Three types: Patent, Plastic, and Latent fingerprints
- Fingerprint dusting powders (aluminum, jet black, fluorescent)
- Ninhydrin solution for porous surfaces
- Cyanoacrylate (super glue) fuming
- Vacuum Metal Deposition (VMD): gold and zinc
- Detecting prints on wiped guns and fired bullet casings
⏱️ Timestamps:
👉 Watch Next:
▶ Rigor Mortis, Livor Mortis, Pallor Mortis: Forensic Stages of Death — https://www.youtube.com/watch?v=intBEYKlaGY
▶ What is DNA and How Does it Work? — https://www.youtube.com/watch?v=YovwL0LwkUg
▶ 7 Scientifically Inaccurate Things They Show in Movies — https://www.youtube.com/watch?v=vMwvOvQO7Aw
#fingerprints #forensicscience #crimesolving #CSI #detective #science #scienceabc
References:
https://doi.org/10.1016/j.forsciint.2018.07.008
https://doi.org/10.1016/j.scijus.2021.05.006
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10178855/
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Voice Over Artist: John Staughton ( https://www.fiverr.com/jswildwood )
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Science & Technology
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