Identifying And Collecting Physical Evidence

1392 Words6 Pages
Identifying and Collecting Physical Evidence There are many differents things involved in the identification and collection evidence. In order to do these things you have to know what things like what physical evidence is, what impressions are, different types of evidence you could find and how to use it and knowing what forensic science is and the different types is important too. Also you need to know the proper labelling technique. In order to prosecute someone you have to be able to prove they were at the scene of the crime when the offence was commited. The collection, analysis and preservation of physical evidence is crucial part of police work. Physical…show more content…
Most crimes include the transfer of bodily fluids or substances such as things like blood, skin, hair, mucus and semen. The police can use any of the substances found on or around the victim for DNA testing and other laboratory tests to match the elements to a particular suspect. Clothing fibers is another one that can be easily transferred from an offender to the victim during the crime. Police can match the fibres with those found in a victims clothes, homes, or cars. DNA The labelling of the evidence is the duty of a scenes of crime officer, done so it can easily be found at a different time. Evidence collected at the scene is all placed in a "evidence package" and tagged. On the tag and the outside of the package the following are provided; description of item, police case number, date when it was collected, location in which it was collected, brand name if any, serial number or clothing information, the name and badge number of the officer who collected the evidence, and the destination that the item is being sent for analysis or storage. Also by labelling it properly police are assured the evidence has not been tampered with or contaminated. The officers will also establish a chain of custody for the evidence. A chain of custody document is a witnessed, written record of all the people who had contact or control over the evidence. When it is
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