Essay on Trace Evidence

1579 Words7 Pages
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 there's another kind of evidence; trace 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…show more content…
Hair comparisons can not identify a hair as coming from one individual to the exclusion of anyone else. DNA testing can strengthen any possible association of the hairs." - Locard. Hair is usually found in unusual amounts when there was a struggle or fight between the victim and suspect or suspects. Hair at a crime scene is usually found on the floor near whatever was used to commit the crime or the point of impact between the suspect and victim. If a hair is found with the root still intact then DNA can be pulled from it although DNA can also be found from fingernails, toenails, and skin flakes. Hair can tell the investigators many things. For insance, the race of the person, whether they dye their hair or not, the natural color of their hair, and if it simply fell out or alot of force was used to pull it out of the scalp. Fibers are found mostly on clothing, furniture, carpeting, and blankets at a crime scene. The fibers found are usually from either clothing or carpet. Cross-transfer of fiber evidence usually occurs where person-to-person contact was established. There are well over a thousand known fibers and a few thousand known dye formulas. Every dye formula is registered and available in the database investigators use to compare these small pieces of evidence. Glass from doors, decorations, or windows are usually found on clothing and the soles of shoes. It can also be found on tools, skin, and even the weapon. Different types of
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