FORS-2106EL Lecture 4: FORS-2106- Day 4
27 Jun 2018
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Forensic Biology - Day 4
Categories of Biological Evidence
-Types of biological evidence and collection methods
-Caveats: Procedure to follow when entering a scene
-Latin for mournings
-Police walk through to assess needs of the scene
-The first thing is accessing if anyone hurt, they are the main priority to help
secure the person
-Looking at types of evidence that may need to be considered
-The body itself is evidence and treated as a crime scene, as well as anything
around the body
-Securing the scene
-Restricting access to the scene to only professionals that are needed
-Officers assigned to the scene
-Forensic investigato
-Coroners
-Any other individuals who are working on the scene
-Protecting evidence from possible contamination
-Moving something from its original location, since moving something could
influence the interpretation of what occurred
-People could come in and move things to interfere with the investigation
-ex. a family going in to move objects around to make a suicide look like a
murder
-Path of contamination will be set up, to restrict where things brought into the
scene ends up
-this path must be searched before people can be walking back and forth on it
-Can be contaminated by fingerprints, hair, DNA evidence
-Don’t want things obscuring, altering, or eliminating evidence
-This can affect the way evidence is packaged and transferred
-ex. bones in a paper bag so it can breathe and no mildew collects
-Proper documentation
-Take photograph of what we see, with a description
-Label all evidence, and document it in its original position, and number all the
evidence
-Who collected it, time, date, location, condition, and photographs
-The numbering is done in order of which it is encountered, so from outside to
inside of the crime scene to reduce contamination
-Proper Collection
-Use a method to minimize the contamination so the evidence can be preserved
-If there is no good way of collecting it then it may be necessary to analyze it at
the scene
-ex. bones that are seen in a fire, therefore moving it will cause it to crumble
-Proper transportation
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Document Summary
Types of biological evidence and collection methods. Caveats: procedure to follow when entering a scene. Police walk through to assess needs of the scene. The rst thing is accessing if anyone hurt, they are the main priority to help secure the person. Looking at types of evidence that may need to be considered. The body itself is evidence and treated as a crime scene, as well as anything around the body. Restricting access to the scene to only professionals that are needed. Any other individuals who are working on the scene. Moving something from its original location, since moving something could in uence the interpretation of what occurred. People could come in and move things to interfere with the investigation. Ex. a family going in to move objects around to make a suicide look like a murder. Path of contamination will be set up, to restrict where things brought into the scene ends up.
