1. Seven Steps to Processing a Crime Scene
Unit #1: Introduction to Forensic Science

2. What has to happen before investigation of a crime must occur?
Yvonne Fletcher, Libyan Embassy, 1984

3. Step #1 – Secure the Scene
Who’s responsibility? What is a priority? Keeping the perimeters and scene protected Who should respond?

4. Step #2 – Separate the Witnesses
Reason for separation
Collusion
Types of questions asked by detectives:
When did the crime occur?
Who reported the crime?
Who are the victims?
Can you identify the perpetrator?
What did you see happen?
Where were you located at the time of the incident?

5. Step #3 – Scan the Scene
What do you notice? Primary or secondary?

6. Step #4 – See the Scene Documenting
Crime Scene Examiner’s responsibilities
Photographing the overall area
Close ups with and without measurement tools
Different Angles

7. Step #5 – Sketching Methods What is needed:
Accuracy and notation of a body(ies) if present
Anchored landmarks
Orientation
Inclusion of furniture and wind
Includes vegetation, cars and other vehicles
A final draft
Why two drafts required?

8. Kurt Cobain, Seattle, 1994

9. Step #6 – Searching for Evidence
4 different patterns How to know which pattern to use What about lighting? Types of evidence Labeling identified evidence
Spiral
Linear
Zone

10. Step #7 – Secure and Collect Evidence
Procedures
Local municipalities versus FBI and CBI
Liquids and arson related evidence
Biological evidence
Packaging process
Chain of Custody Procedures
Packaged, sealed and labeled

11. JonBenet Ramsey
December 25, 1996