Firearm Identification Ballistics Firearm Examiner Expert in the
Firearm Identification & Ballistics
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
Career Exploration • • • Physics Mathematics Analytical chemistry Biology High use of microscopes Great interpretation of scientific research
Classification of Guns • 4 types of guns • 4 types of bullets • 4 types of cartridge marks
What Bullets are made of • • Tin Antimony Copper Zinc
What cartridges are made of • Lead • Crass • Gun powder (potassium nitrate, charcoal, and sulfur)
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
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
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
Home Learning • Firearms Identification &Ballistics Analysis Questions Part 1 are due Thursday. • Power. Point Presentation and questions will be posted online.
- Slides: 10