Forensic Science: Fundamentals & Investigations, Chapter 2 1 C.S.I. and Evidence Collection Principle of Exchange Principle of Exchange Established by Dr. Edmond Locard, the principle states: When a person comes in contact with an object or another person, a cross- transfer of physical material can occur Study of the material can determine the nature and duration of the transfer
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Forensic Science: Fundamentals & Investigations, Chapter 2 1 Principle of Exchange C.S.I. and Evidence Collection Principle of Exchange Established by.
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Evidence taken from a crime scene. Direct or circumstantial evidence? ________ Physical or biological evidence? ________ Class or individual evidence? ________
The Seven The Seven SS’s of Crime Scene ’s of Crime Scene Investigation Investigation
1. Secure the scene2. Separate the witnesses3. Scan the scene4. Seeing the scene5. Sketch the scene 6. Search for evidence7. Secure the collected evidence