1. Crime Scene

2. Processing the Scene Secure and Isolate the Scene
Physical Evidence – any and all objects that can establish that a crime has been committed
Helps to link a victim/crime with the perpetrator
Secure and Isolate the Scene
First officers responsibility – Preserve life, protect scene
Keep out unauthorized personal
Once secured, processing can begin

3. Record the scene Must be done quickly to retain untouched state
What are the uses for this??
Photography – unaltered!! What should be included here?
Sketches – rough sketch contains proper dimensions and location of objects. Finished sketch – drafting tools (CAD)
Both require training!!
Notes – must be constant throughout investigation (where, who, how, when)
Recorders/videos are great

4. Evidence Searches TYPES OF SEARCHES Methods will vary based on:
Spiral Search
Grid method
Strip or line search
Quadrant/Zone search
Methods will vary based on:
Size/location of scene

5. Items to be sent to Forensics Lab
Victims clothing
Fingernail scrapings
Hairs
Blood
Swabs (various types – sex crimes, GSR)
Bullets
What is the time sensitivity of these objects?

6. Collecting/Packaging Evidence
Must be done to avoid any changes from taking place to the evidence
Common sense must be used when evidence is in ‘Tough’ spots (doors, large objects)
**Each different item or similar items collected at different locations MUST be packaged separately to avoid cross contamination**

7. Chain of Custody ‘Continuity of possession’
Every person who handles the evidence MUST be accounted for
Evidence must be correctly labeled with initials and time(date)
Transfers of evidence must be noted ex. whomever takes it to the lab
Fewer the better! (see hand out)

8. Obtain Controls What is the purpose of a control?
Why is it so important in forensic investigations?
Buccal swab – open wide!!!!

9. Safety Concerns at the Scene
Many reforms brought on by the spread of AIDS and Hepatitis B due to OSHA regulations
Gloves, Shoe covers, coveralls
Mask/respirator, goggles,
Be on the lookout for sharp objects
Label biohazards as such
Uncontaminated note taking (pens, pads,etc.)
Contaminated clothing must be washed immediately – 10% bleach solution
No eating/drinking/smoking or make-up