- Has someone been sending you poison letters or threat letters?
- Did someone damage, steal or touch your property/ possessions?
- Are you suspecting that someone accessed your electronic devices without your permission?
How can TFEG help you?
The Forensic Experts Group can help provide answers to your questions by examining your questioned items (e.g. threat letter, broken lock, electronic devices) for the presence of fingerprint(s). If latent fingerprints are found and are of sufficient quality, recovery of prints may ensue. The recovered fingerprints can be useful in your investigations.
Principle behind fingerprint examination
When a person touches a surface, latent fingerprints due to the natural oils and sweat of our skin may be unknowingly deposited on the surface.
Detection of fingerprints
Unlike patent fingerprints which are readily visible to the observer, latent fingerprints are barely or not discernible to the naked eye. They have to be treated with enhancement chemicals to render them visible. The type of chemicals and techniques used to process the fingerprints depend on the type of substrate (surface) the prints are on. Read more about the factors affecting fingerprint deposition.
Recovery of fingerprints
Once a latent fingerprint is developed or enhanced, it is recovered or preserved for further analysis. Methods of recovery include photography and lifting of the fingerprints, depending on the enhancement method(s) used and/ or the surface the fingerprint is on. As the name suggests, fingerprint lifting involves the use of an adhesive material to lift a fingerprint off a surface. When a latent fingerprint of sufficient quality is detected on an item of interest, it can be used for fingerprints comparison.
Click here to read more about Prints Evidence.
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