1. Footwear Evidence
Impressions
Prints

2. Summary What is footwear evidence? How is it involved in crime scenes?
How is it collected?
How is it analyzed?

3. What is footwear evidence?
Prints left at crime scene.

4. Classification of Impressions:
Footwear Evidence
Classification of Impressions:
Plastic-3-D
Shoeprint made in soft material (dirt, snow)
Requires making a cast of the print .

5. :Patent(visible) Dirt or other material picked up by shoe.
Footwear Evidence
:Patent(visible)
Dirt or other material picked up by shoe.

6. Footwear Evidence
:Latent-hidden

7. : Can leave behind barely visible dust
Footwear Evidence :
Can leave behind barely visible dust
Can leave impression in polish/wax/dust

8. Why shoes? Most suspects wear shoes. Can provide class characteristics
Footwear Evidence
Why shoes?
Most suspects wear shoes.
Can provide class characteristics
Size, gender, style
Burglar
Shoes

9. What information can shoe prints provide?
Footwear Evidence
What information can shoe prints provide?
Link suspect or victim to scenes
Location of prints can:
Lead to more evidence
Refute alibis
Gait or Tracking information?

12. COLLECTION of Footwear evidence
Footwear Evidence > Collection
COLLECTION of Footwear evidence .
1. photograph
2. lifting latent print-luminol, dusting, electrostatic lift or gel lift
3. casting plastic impression

13. Recovery of Footwear evidence
Footwear Evidence > Collection
Recovery of Footwear evidence
Some prints can be visualized by darkening a room and using a bright light at a low angle.

14. After photo, 2-D print can be lifted:
Electrostatic Lifting:
A charge is used to lift dry materials from surface to black film.
Non-destructive
Photographed for evidence

15. After photo, 2-D print can be lifted:
Footwear Evidence > Collection
After photo, 2-D print can be lifted:
Dusting:
Fingerprint powder

16. 3-D impression can be highlighted
Footwear Evidence > Collection
3-D impression can be highlighted
Spraying with colored wax spray

17. CASTING a 3-D impression
Footwear Evidence > Collection
CASTING a 3-D impression
Cast picks up detail; is durable

18. Analysis of Footwear Evidence:
Footwear Evidence > Analysis
Analysis of Footwear Evidence:
Class Characteristics can be used to INCLUDE or EXCLUDE a suspect.
Size
Tread Pattern
Suspect shoe ( CONTROL) compared.

19. Analysis of Footwear Evidence:
Footwear Evidence > Analysis
Analysis of Footwear Evidence:
Individual Characteristics can be used to identify an exact shoe.
Cuts, defects, wear and tear,or other .