Many cases are won or lost by the weight of the prosecution’s evidence. Through methods of discovery of evidence‚ both the prosecution and defense have equal opportunity to develop evidence they believe is needed to prove or dismiss/ reject claims. Trace evidence and the preservation of evidence are very vital in any investigation. These two components are two of the most important things that can help investigators find their suspect(s)‚ and lock them up or if done without proper care‚ the preservation
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include metal filings‚ plastic fragments‚ gunshot residue‚ glass fragments‚ feathers‚ food stains‚ building materials‚ lubricants‚ fingernail scrapings‚ pollens and spores‚ cosmetics‚ chemicals‚ paper fibers and sawdust‚ human and animal hairs‚ plant and vegetable fibers‚ blood and other body fluids‚ asphalt or tar‚ vegetable fats and oils‚ dusts and other airborne particles‚ insulation‚ textile fibers‚ soot‚ soils and mineral grains‚ and explosive residues. Although these are the most common found
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stains‚ sawdust‚ plastic fragments‚ pollens‚ lubricants‚ condoms‚ spores‚ gunshot residue‚ chemicals‚ metal fillings‚ fingernail scrapings‚ building materials‚ glass fragments‚ feathers‚ paper fibers‚ animal and human hairs‚ plant and vegetable fibers‚ blood and other body fluids‚ tar or asphalt‚ vegetable oils and fats‚ dust‚ cosmetic‚ and other airborne particles‚ textile fibers‚ soils and mineral grains‚ and explosive residues. In the following main forms of trace evidence is that most forensic
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made through a mixture of sulfur‚ charcoal‚ and potassium nitrite. (Hellemans and Bunch‚ 75) These basic elements are important because modern powder is simply a refined version of the primitive substance and is standardized enough that gunpowder residue can be analyzed by methods which identify specific components. (Klatt) There is no official date and place of origin for the invention of the gun‚ however it is known that the continual catalyst for the development of firearms is and has always
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Unit 3 Law review- Purposes of Criminal Law- Exists to label wrongful behaviour‚ to identify violations and impose sanctions. Labelling ‚ identifying‚ and sanctioning wrongful behaviours achieves two things: retribution and the protection of society. Actus Reus: The guilty act. To prove actus reus‚ the Crown would have to demonstrate that a) there was no consent‚ b) force was applied. Mens Rea: The guilty mind. Done with criminal intent or knowledge that what he/she did was against the law
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The History of Forensic Science Law Enforcement has used forensic science for years to help solve puzzling crimes. But not to many people know just how long the art of forensic science has been around. For example evidence of fingerprints were found in paintings and prehistoric rock carvings made by humans. The Chinese have probably used forensics much longer than most civilizations. For example back in the 700’s they used fingerprints to find out the identity of documents and clay sculptures.
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The Federal Bureau Of Investigations labratory has been around since November 24‚1932. Back then it was only a single agent in a single room with some basic equipment. Flash forward to today and it is one the largest and most state of the art facilities in the world. The FBI has 56 field offices throughout the U.S. Their main labratory is located in Quantico‚ VA. The lab is comprised of five sections each with varying numbers of sub-sections. The provide an array of services anyhting from maintaining
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Forensic Ballistics Most of us will have heard the term ballistics at some time or other-more often than not when we have been watching fictionalized accounts of police work on television or in the cinema. When you think of forensics you may think of something like “The Forensic Files”‚ “NCIS”‚ or even “Law and Order”. Although‚ ballistics is a part of forensics first we will look at forensics itself and how it came about. After getting the basics about the foundation in forensics we will look at
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well known type of forensic scientist is the medical doctor who performs the autopsies. They are the ones who determine the time and cause of death. Others specialize in things like firearms where they are able to analyze bullet fragments or gunshot residue to
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Evidence Collection Guidelines This document provides evidence collection guidelines for the following types of evidence. Your agency ’s policies may vary. Please check with your supervisor if you have any questions. Contents Blood Stains Seminal Stains Hair Fibers and Threads Glass Paint Flammable Liquids Firearms Evidence Tool Marks ws Questioned Documents Latent Fingerprints In all cases
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