2. Once the scene has been secured, a lead investigator will start processing the crime scene area.

3. FIRST RULE Cardinal Rule
Guard evidence against damage, contamination or loss and document everything
Cardinal Rule
“Eyes open, mouth closed, hands in pockets!”

4. In many cases there may be more than one crime scene!
Primary Crime Scene:
-where the crime occurred ex. the bank, the murder site etc. This may not be available to the police and may never be found.
-usually gives more information if it can be found
Secondary crime scene:
Related to the crime but not where it occurred.
This could be where a body was dumped or where a car was found that was used in the crime.

5. Processing the crime scene
Forensic science begins at the crime scene
Crime lab runs on physical evidence
Physical evidence
-any and all objects that can establish that a crime has been committed or can provide a link between a crime and its victim or a crime and its perpetrator

6. SECURE AND ISOLATE
The first officer on the scene needs to protect the area and rope or barricade it off
Detain the person who reported the crime. They may be a witness or a suspect. They need to ensure that the perpetrator is not present and arrest them if they are
Keep witness separate to avoid collusion

7. Preserve and protect
Lead investigator will determine the size of the crime scene. This should include
The spot the offense took place
Entrance, exits or escapes
Location of key evidence, i.e. body, safe, weapons

8. Documenting and Processing
Detailed notes need to be taken by sketch, photo, video and audiotape.
Photos are taken BEFORE ANYTHING CAN BE MOVED!
To determine size a ruler can be used or anything of known size
Sketch gives the dimension, distance, content and relationship between items

9. Crime Scene Process Several techniques Same protocol every crime scene
Interview
Examine
Photograph
Sketch
Process