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If the crime involves a gun, the CSI will collect clothing from the victim and anyone who may have been at the scene so the lab can test for GSR. GSR on the victim can indicate a close shot, and GSR on anyone else can indicate a suspect. The CSI places all clothing in sealed paper bags for transport to the lab.
- Julia Layton
To help identify the evidence that is most valuable, the crime scene personnel may conduct initial screening tests, called presumptive tests, at the scene. These tests can be useful in determining the type of substance present—whether it’s a toxin or a drug, a stain that contains body fluids, or even whether a dried red substance found in the kitchen is blood or ketchup.
A fire in a methamphetamine lab devastates an apartment building. A car accident claims the life of a driver during her trip home. These are all potential crime scenes. By conducting a systematic examination of these areas, crime scene investigators uncover the physical evidence to help identify what happened and who was involved.
- Locard’s Exchange Principle (1928) ‘Every contact leaves a trace’ Professor Edmond Locard (1877-1966) was a French scientist credited for setting up the first modern crime laboratory in Lyon, France.
- Sequential Examination. To ensure that the data recovered during an examination can be optimised, it is essential that the sequence of examination proceeds from non-invasive to most invasive.
- Continuity and Disclosure Material. There is a burden placed on the prosecution to preserve all material produced from an investigation. This material is then made available to the defence, to ensure that accurate cross-examination can be conducted.
(CSI). The purpose of the Crime Scene Investigation Procedures Manual is to provide a CSI with the methods and protocols needed to provide quality crime scene examination and documentation. This manual provides procedures for the work conducted by a CSI at crime scenes, post crime scene related responsibilities, or anywhere the duties of a CSI ...
Mar 5, 2024 · Crime scene investigation (CSI) is a meticulous and multifaceted process that combines elements of law, forensic science, and investigative techniques to solve crimes. This intricate dance of ...
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What is Crime Scene Investigation (CSI)?
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Why are crime scene investigations so complex?
Jan 1, 2024 · CSIs need better tools to aid in reasoning processes and improve CSI outcomes. Crime scene investigations are highly complex environments that require the CSI to engage in complex decision-making. CSIs must rely on personal experience, context information, and scientific knowledge about the fundamental principles of forensic science to both ...
