1. Evidence Collection

2. Fingerprinting Do not change during life
Impression of the friction ridges on a finger
Fingerprints are usually never found at a crime scene or its too hard to narrow the fingerprint down

3. If a person doesn’t have fingerprints on file, then finding fingerprints is usually useless

4. Types of Fingerprints
Latent
Visible
Plastic
invisible

5. Latent Prints Impressions on a surface
Can be left because of blood, oil, dirt
Can be found on any hard, smooth surface
Can be visible or invisible

6. Visible Prints
Can be dusted and lifted

7. Plastic Prints Form of visible print Left in soft surfaces
Are photographed not dusted

8. Invisible prints
Can be seen after applying powders or chemicals

9. Elimination Prints
Prints of people with a reason to be at the crime scene

10. Ballistics
Science that deals with the motion and flight of projectiles, usually bullets

11. What to know about a gun? Manufacturer Model Caliber
Position of safety (on/off)
Position of hammer (cocked/uncocked)

12. Ballistics Lab Does a function and fire test (does it work?)
Matching a bullet to a gun
Identify make, model, etc of an unidentified gun

13. If a person is shot… And dies, the bullet is removed for investigation
And lives, police need person’s permission or a warrant to remove the bullet for evidence

14. Gunshot Residue Used to see if a person has recently fired a gun
Gun powder gets on hands when you fire a gun