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An example of chain of custody would be the recovery of a bloody knife at a murder scene: Officer Andrew collects the knife and places it into a container, then gives it to forensics technician Bill. Forensics technician Bill takes the knife to the lab and collects fingerprints and other evidence from the knife.
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Crime scene reconstruction help put pieces of a case together. The steps to crime scene reconstruction involve: the initial walk-through and examination of the crime scene, organizing an approach for collecting evidence, formulate a theory, use the theory to track down suspects, reconciling all evidence that refutes the hypothesis or creates one.
Knowing that crucial information for an investigation can be found at a crime scene, forensic photography is a form of documentation [1] that is essential for retaining the quality of discovered physical evidence. Such physical evidence to be documented includes those found at the crime scene, in the laboratory, or for the identification of ...
Finally, the analyst can now complete analysis and interpretation of the DNA sample and compare to known profiles. [23] An unknown sample found at a crime scene is called a questioned sample. A known sample can be taken either from a suspect or found in a database. The FBI’s database used for DNA is CODIS, Combined DNA Index System. It has ...
Crime Scene Sketching: the drawing of a crime scene; in the sketch, an investigator includes measurements and dimensions to aid in displaying the layout of the scene. This helps support the information shown in photographs of the scene. [6] Demonstrative evidence: any visible, physical evidence used in legal proceedings. These are used to ...
The most important aspect of evidence collection and preservation is protecting the crime scene. This is to keep the pertinent evidence uncontaminated until it can be recorded and collected. Eating, drinking, or smoking should never be allowed at a crime scene. [5] A command post should be set up for such purposes.
Footwear impression can reveal information that may be of use to forensic investigators. Analysis of impressions found at a crime scene may provide the following information: Number of people at a crime scene: Different footwear impressions left at a crime scene will indicate more than one person was present at the crimescene.