Since the beginning of recorded history, stones have been used in the commission of crimes due to their widespread availability. Stones can be used as a lethal weapon that sometimes might be the only evidence in a serious case. The common perception, even in professional fingermark circles, is that stones do not yield identifiable latent fingermarks. The authors of this research paper examined the feasibility of developing fingermarks from seven types of stones using three latent fingermark techniques: magnetic powder, cyanoacrylate fuming, and ninhydrin. The paper will demonstrate that by classifying stones and rocks according to their natural properties (porosity, permeability, and the nature of surface area), even application of the simplest development techniques can produce good results. In conclusion, chert and limestone yielded the most qualitative and quantitative results using magnetic powder. The time factor is also important in recovering latent fingermarks on stones and rocks.
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Article Synopsis
- Fingermarks are crucial evidence in forensics, used to identify or exclude suspects in criminal cases, and they're increasingly important in tech applications like unlocking devices and securing bank info.
- Current fingerprint development techniques don’t meet the needs of both traditional forensic work and modern technology.
- This paper introduces a new method using conductive paint and silicone to effectively develop, recover, and preserve different types of fingermarks, creating detailed casts that are useful for forensic analysis and compatible with fingerprint scanners on mobile devices.
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