Importance of Fingerprint Evidence in a Criminal Investigation
Fingerprint evidence was considered a crucial piece of evidence in criminal investigation. In a criminal case, fingerprint evidence is based on two fundamental principles.
The first is that the swirled skin the fingertips of a human being does not change over his or her lifetime. The second principle is that no two individuals can have an identical pattern of friction ridges. Even siblings and twins have different fingerprints.
Law enforcement officers make use of fingerprints to identify defendants by making a comparison between the prints already existing in the police files and the prints found at the scene of crime.
Matching of fingerprint involves matching several points that are common between the two sets of prints. Fingerprinting experts have a disagreement over the minimum number of points required to match in order to declare a perfect match. To know about Corn Huskers Moisterizing Lotion from Fingerprint Depot, you can browse the web.
How are Fingerprints Found?
One of the challenges commonly faced by the officers investigating a criminal case is to find good fingerprints at the scene of crime. Several rows of sweat pores are contained in the friction ridges in the hands. Hands typically have sweat that is mixed with dirt as well as natural body oils, and this leaves fingerprints on even surfaces.
Crime investigators make use of certain chemicals and powders to make the prints visible. How clear the fingerprints are in such a situation will largely depend on the quality and smoothness of the surface from where they are lifted. New and advanced computer-based fingerprint enhancement techniques are now available to develop a full pattern of fingerprints where only some fragments of prints are available.