Firearm Identification

1
Firearm Identification Ballistics
2
Firearm Examiner

• Expert in the id of firearms that involves
  the id, comparison, and testing of
• Bullets
• Cartridges
• Gunshot residue
• Science of ballistics
• Trace metal detection

3
Career Exploration

• Physics
• Mathematics
• Analytical chemistry
• Biology
• High use of microscopes
• Great interpretation of scientific research

4
Classification of Guns

• 4 types of guns
• 4 types of bullets
• 4 types of cartridge marks

5
What Bullets are made of

• Tin
• Antimony
• Copper
• Zinc

6
What cartridges are made of

• Lead
• Crass
• Gun powder (potassium nitrate, charcoal, and
  sulfur)

7
Bullet Comparisons

• Barrels are unique to the manufacturer
• Each manufacturer creates a unique pattern of
  inside, spiral grooves
• These are called lands
• Class characteristics produce a clockwise or
  counterclockwise spin

8
Bullet Comparison

• Comparison microscopes are used to see the fine
  lines or striations
• No 2 barrels have an identical striation pattern
  which adds to how cases showing the identity of
  the shooter is proven

9
Bullet Comparison

• IBIS (Integrated Ballistic Identification System)
  is a database compiled from the FBI and the ATF.
• ballistics fingerprinting network of data about
  all guns reported in crimes

10
Home Learning

• Firearms Identification Ballistics Analysis
  Questions Part 1 are due Thursday.
• PowerPoint Presentation and questions will be
  posted online.