1. Processing the Crime Scene
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2. The Seven S’s of Crime-Scene Investigation
1. the Scene 2. the Witnesses 3. the Scene 4. the Scene 5. the Scene 6. for Evidence 7. and Collecting Evidence

3. First Officer on the Scene
Chapter 3
1. Securing the Scene
First Officer on the Scene
A the crime scene, determines the nature of the crime and assist the injured
D the witness
A the perpetrator (if possible)
P the crime scene from destruction/addition of evidence T
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Chapter 3
2. Separating the Witnesses
Witnesses must not be allowed to
Investigators will the witnesses’ accounts to each other
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5. Kendall/Hunt Publishing Company
Chapter 3
3. Scanning the Scene
4. Seeing the Scene
Scanning the Scene
Where do need to be taken?
Primary vs. crime scene
Seeing the Scene
Crime scene examiner will take photos
Overall area and photos will be taken
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6. Kendall/Hunt Publishing Company
Chapter 3
5. Sketching the Scene
Crime Scene Sketch
Date: August 14, Criminalist: Ann Wilson
Time: 11:35 am Location: 4358 Rockledge Dr., St. Louis, Mo. N
5 ft
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7. Kendall/Hunt Publishing Company
Chapter 3
6. Searching for Evidence
Search Methods
pattern—basically a double-line search; effective, but time-consuming
pattern—best in large, outdoor scenes
pattern—most effective in houses or buildings; teams are assigned small zones for searching
pattern—may move inward or outward; best used where there are no physical barriers
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8. Kendall/Hunt Publishing Company
Chapter 3
7. Securing and Collecting Evidence
Packaging
Most items should be packaged in a primary container and then placed inside a secondary one.
Trace evidence may be placed on a piece of paper which is then folded in a particular
way called a
These are then placed inside other containers such as paper bags, plastic bags, etc.
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9. Kendall/Hunt Publishing Company
Chapter 3
Chain of Custody
There must be a of all people who have had of an item of evidence
Evidence container must be marked for identification.
Collector’s initials should be placed on the seal.
If evidence is turned over to another person, the transfer must be recorded.
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Video
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