Trace Evidence Essay examples -- essays research papers

Crime tantrums are known to hurl many clues left behind. The obvious would be a the tree trunk or bodies, clothing, and sometimes even the murder weapon. While these are great way to cultivate a case theres an new(prenominal) kind of inference breath evidence. Trace evidence are low-spirited pieces of evidence that are laying around a crime scene. There are many types of trace evidence some of them include metal filings, plastic fragments, gunshot residue, glass fragments, feathers, food stains, building materials, lubricants, fingernail scrapings, pollens and spores, cosmetics, chemicals, newspaper publisher fibers and sawdust, human and animal bulls, plant and vegetable fibers, blood and other body fluids, asphalt or tar, vegetable fats and oils, dusts and other air naturale particles, insulation, textile fibers, soot, soils and mineral grains, and explosive residues. Although these are the near common found elements, they are non the only ones. The Trace Evidence U nit is known to examine the largest variety of evidence types and apply the biggest range of analytical methods of any unit. materials are compared with standards or knowns samples to make up whether or not they share any common characteristics. In this paper I leave alone discuss the different kinds of trace evidence and how crime scene investigaros consumption it to solve cases and convict criminal.Trace evidence was first discovered by Edmond Locard. Edmond Locard was born in 1877, and founded the Institute of Lyons Institute of Criminalistics. He is overly known for advancing the science of finger photographic prints. In 1910 he was authorized to start a small forensic laboratory in the Palais de Justice which he order until 1951.While there he worked on criminal identification methods including poroscopy- the microscopic examination of fingerprints analyses of body fluids, hair and skin and graphometry or handwriting analysis. He is the man liable for coming up with the theory that when two objects come in contact with each other they leave some kind of material matter behind. This theory was later called Locards Exchange Principle. The idea is that the evidence can be used to pertain objects, individuals or locations with one another." A person typically loses somewhat 100 hairs a day. These hairs may be of evidentiary value to show contact between two people. With an adequate hair standard, a trace chemist will be able to microscopically compare a... ...furniture which may be locked. They then use the small paint chips and metal as evidence and work out them the way that individual piece of evidence should be processed.Believe it or not, wounds from a dupe are also evidence. The wound can allow the investigators to mate up any marks that could have been made from the weapon and therefore allows them to determine at what angle, distance, and how fast the weapon was used.The last type of evidence I will discuss are documents. Everyone ha s a different handwriting and different characteristics that make it unique. Computers are also unique in the way they type and print out things. Document examiners can look over these and establish the similarities in the handwriting and figurer forensic specialists can extract logs and other data from most devices.As you can see there is no perfect crime. The littlest piece of hair or paint or anything left behind can be found. Suspects often miss these tiny peieces of evidence and while they looked over it, it is still lurking at the crim scene. It is guarenteed that a Crime Scene Investigator will find this evidence no matter how small and use it to find, prosecute, and convict a criminal. Trace Evidence Essay examples -- essays research papers Crime scenes are known to have many clues left behind. The obvious would be a the body or bodies, clothing, and sometimes even the murder weapon. While these are great way to solve a case theres another kind of evidence t race evidence. Trace evidence are small pieces of evidence that are laying around a crime scene. There are many types of trace evidence some of them 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 elements, they are not the only ones. The Trace Evidence Unit is known to examine the largest variety of evidence types and used the biggest range of analytical methods of any unit. materials are compared with standards or knowns samples to determine whether or not they share any common characteristics. In this paper I will discuss the differ ent kinds of trace evidence and how crime scene investigaros use it to solve cases and convict criminal.Trace evidence was first discovered by Edmond Locard. Edmond Locard was born in 1877, and founded the Institute of Lyons Institute of Criminalistics. He is also known for advancing the science of fingerprints. In 1910 he was authorized to start a small forensic laboratory in the Palais de Justice which he directed until 1951.While there he worked on criminal identification methods including poroscopy- the microscopic examination of fingerprints analyses of body fluids, hair and skin and graphometry or handwriting analysis. He is the man responsible for coming up with the theory that when two objects come in contact with each other they leave some kind of material matter behind. This theory was later called Locards Exchange Principle. The idea is that the evidence can be used to associate objects, individuals or locations with one another." A person typically loses about 100 ha irs a day. These hairs may be of evidentiary value to show contact between two people. With an adequate hair standard, a trace chemist will be able to microscopically compare a... ...furniture which may be locked. They then use the small paint chips and metal as evidence and process them the way that individual piece of evidence should be processed.Believe it or not, wounds from a victim are also evidence. The wound can allow the investigators to match up any marks that could have been made from the weapon and therefore allows them to determine at what angle, distance, and how fast the weapon was used.The last type of evidence I will discuss are documents. Everyone has a different handwriting and different characteristics that make it unique. Computers are also unique in the way they type and print out things. Document examiners can look over these and establish the similarities in the handwriting and computer forensic specialists can extract logs and other data from most devices.A s you can see there is no perfect crime. The littlest piece of hair or paint or anything left behind can be found. Suspects often miss these tiny peieces of evidence and while they looked over it, it is still lurking at the crim scene. It is guarenteed that a Crime Scene Investigator will find this evidence no matter how small and use it to find, prosecute, and convict a criminal.