Physical Evidence and Forensic Science
Physical evidence is defined as the material either full or partial that can prove, through scientific examination, that a crime is committed. It can be anything from a car to a microscopic object (Birzer & Roberson, 2011). This physical evidence should be collected, stored, examined and documented in a way that they do not lose their originality. The variety of physical evidence that can be collected at a crime investigation is infinite. Physical evidence can be classified through the type of crime, by its state, its composition, and nature of evidence. It is not always necessary that physical evidence is always visible to the eye and some of the most dominating physical evidence are visible through …show more content…
There is friction ridge skin on fingers, palms, soles of feet of every human being made up of complex patterns of valleys and hills to support grip, numerous ridge and miniatures are there in a single fingerprint that makes all of them unique.
Fingerprint section is an integral part of forensic science for more than 100 years. This is because of the uniqueness of the fingerprints as analysts have not found any two fingers with the same ridge structure. Uniqueness of fingerprints are analyzed by examination number, relative location and identity of the ridge (James, Nordby, & Bell, 2014).
Trace Evidence
The objects like fibers, glass, hair, soil etc. are easy to transfer from an object or person and are categorized as trace evidence. This type of evidence typically includes only substances and materials that are present at the crime scene or are related to the crime. Trace evidence can also be stated as physical evidence that is very small in size and can be examined through lab instruments (Shaler, …show more content…
Tool marks are broadly categorized into two types - striations and impressions. Impressions are the marks created when a tool is pushed or forced in a surface. The striations are the marks created by the tool moved or slides across a surface. Most common issues faced in tool marks study are to accurately reproduce the tool mark present at a crime scene as a slight difference of the angle through which tool marks are created can change its shape and size drastically (Strom, & Hickman,
Physical evidence is defined as the material either full or partial that can prove, through scientific examination, that a crime is committed. It can be anything from a car to a microscopic object (Birzer & Roberson, 2011). This physical evidence should be collected, stored, examined and documented in a way that they do not lose their originality. The variety of physical evidence that can be collected at a crime investigation is infinite. Physical evidence can be classified through the type of crime, by its state, its composition, and nature of evidence. It is not always necessary that physical evidence is always visible to the eye and some of the most dominating physical evidence are visible through …show more content…
There is friction ridge skin on fingers, palms, soles of feet of every human being made up of complex patterns of valleys and hills to support grip, numerous ridge and miniatures are there in a single fingerprint that makes all of them unique.
Fingerprint section is an integral part of forensic science for more than 100 years. This is because of the uniqueness of the fingerprints as analysts have not found any two fingers with the same ridge structure. Uniqueness of fingerprints are analyzed by examination number, relative location and identity of the ridge (James, Nordby, & Bell, 2014).
Trace Evidence
The objects like fibers, glass, hair, soil etc. are easy to transfer from an object or person and are categorized as trace evidence. This type of evidence typically includes only substances and materials that are present at the crime scene or are related to the crime. Trace evidence can also be stated as physical evidence that is very small in size and can be examined through lab instruments (Shaler, …show more content…
Tool marks are broadly categorized into two types - striations and impressions. Impressions are the marks created when a tool is pushed or forced in a surface. The striations are the marks created by the tool moved or slides across a surface. Most common issues faced in tool marks study are to accurately reproduce the tool mark present at a crime scene as a slight difference of the angle through which tool marks are created can change its shape and size drastically (Strom, & Hickman,