1. THE CRIME SCENE
CHAPTERS 4 & 5

2. PROCESSING THE CRIME SCENE

3. DEFINING A CRIME SCENE Primary Crime Scene Secondary Crime Scene
Macroscopic
Microscopic

4. PHYSICAL EVIDENCE Relation between VICTIM SUSPECT SCENE OBJECTS

5. INFORMATION FROM EVIDENCE
VERIFY STATEMENTS
IDENTIFICATION OF SUSPECTS
AFIS, CODIS
SUBSTANCE IDENTIFICATION
DRUGS, ACCELERANTS,
SCENE RECONSTRUCTION
INVESTIGATIVE LEADS

6. LOCARD’S EXCHANGE PRINCIPLE
Whenever two objects come into contact, a mutual exchange of matter will take place between them.

7. SCIENTIFIC METHOD METHODOLOGICAL SYSTEMATIC LOGICAL
APPLICATION OF KNOWLEDGE

8. CRIME SCENE MANAGEMENT
ABILITY TO SOLVE CRIME A TEAM EFFORT
INFORMATION MANAGEMENT
MANPOWER MANAGEMENT
TECHNOLOGY MANAGEMENT
LOGISTICS MANAGEMENT

9. FIRST RESPONDERS Assist the victim Search for / arrest suspect
Detain witnesses / keep separate
PROTECT CRIME SCENE / LOG
DO NOT SMOKE, DRINK OR EAT
Infect self
Contaminate scene
Communicate all information to detectives

10. CRIME SCENE PROCEDURES
SECURE SCENE
SURVEY SCENE
Minimize contact by ALL personnel
Use Personal Protective Equipment
Note evidence
Protect evidence that may be lost
Note weather conditions
Use alternate entry
Record EVERYTHING

11. APPROACH THE SCENE

12. SECURE AND PROTECT THE SCENE

13. PRELIMINARY SURVEY OF THE SCENE

14. NARRATIVE: DESCRIPTION OF THE SCENE

15. CRIME SCENE DOCUMENTATION
NOTES
VIDEO
PHOTOGRAPHY
SKETCHES

16. CRIME SCENE DOCUMENTATION
NOTES
Immediate
Accurate
Continuing
VIDEO
3D Documentation of scene
Orientation of scene but no narrative
DO NOT EDIT

17. PHOTOGRAPH THE SCENE

18. CRIME SCENE DOCUMENTATION
PHOTOGRAPHY
BEFORE MOVING EVIDENCE
SYSTEMATIC
OVERVIEW
MIDRANGE
CLOSE-UP
LOG / CAMERA SETTINGS
SCALE

19. Three Types of Photographs
1. Overall
2. Midrange
3. Closeup

20. CRIME SCENE DOCUMENTATION
SKETCHES
Assign measurements to objects
Triangulation
Baseline
Polar Coordinates
Rough / finished
Legend

21. SKETCH THE SCENE

22. Rough Sketch

23. Finished Sketch

24. CRIME SCENE SEARCH
SYSTEMATIC / METHODICAL
LINE
GRID
ZONE
WHEEL
SPIRAL

25. Search Patterns

26. EVALUATION OF THE PHYSICAL EVIDENCE AT THE SCENE

27. COLLECTION & PRESERVATION OF PHYSICAL EVIDENCE
One CSI in charge
Priority to easily destroyed evidence
Primary packaging
Contain and protect
Secondary packaging
Seal and tamper resistant
INITIAL / DATE / TIME
Identity of item enclosed

28. Evidence Bindles

29. DETAILED SEARCH OF THE SCENE

30. COLLECTION & PRESERVATION OF PHYSICAL EVIDENCE
Each item separate
Wet items
Temporary in plastic
Air Dry
Permanent in paper
Arson evidence – air tight containers
Controls

31. COLLECTION, RECORDING, MARKING AND PRESERVATION OF EVIDENCE
What constitutes a seal?
Initials on article or container
Description of contents
Paper is our friend!
Evidence Bindle

32. PROCESS THE SCENE FOR LATENT PRINTS AND COLLECT ANY PRINTS DEVELOPED

33. CRIME SCENE RECONSTRUCTION
Data Collection
Conjecture
Hypothesis Formulation
Testing
Theory

34. STOP AND THINK OF ANYTHING FURTHER THAT MIGHT BE COLLECTED.
FINAL SURVEY!!!
STOP AND THINK OF ANYTHING FURTHER THAT MIGHT BE COLLECTED.

35. RELEASE OF THE CRIME SCENE