Terry A. Smith
|Posted on Tuesday, March 12, 2002 - 08:35 am: ||
Without seeing this found impression your question is a difficult one to answer. I am assuming that the print matrix is simply one that is "gunky" because the subject who left it had some foreign material on the hand which transferred onto the substrate (receiving surface). Such prints MAY still yield useful information in lieu of friction ridge detail -such as the duplication of the flexion creases of the hand. The oily substance MAY also be an important piece of evidence in terms of chemical composition and so on...
But, as your fingerprint examiner friend can also tell you, sometimes "it" (useful forensic evidence) just isn't there - and it's time to move the investigation in another direction.
JURY G. ROCAMORA
|Posted on Tuesday, March 12, 2002 - 07:45 am: ||
I just wanted to get your idea on what appropriate powder or chemicals should I use on latentprints that are contaminated with oils. My friend a fingerprint examiner has failed to obtain prints after he developed it with powder. Its disgusting the subject latent print is supposedly the only evidence found in the crime scene. I want to make it clear: the print does not show ridges but my friend is sure it was a palm print.Could anybody there wanted to help?