- 01: Introduction
- 02: History
- 03: Propellants, Firearms, and Ammunition Development
- 04: Modern Firearms Manufacture
- 05: Small Arms Ammunition
- 06: Evidence Handling Procedures
- 07: Equipment and Instrumentation
- 08: Examination of Firearms
- 09: Cartridge and Shotshell Examination
- 10: Characterization and Evaluation of Fired Projectiles
- 11: Bullet Comparison and Identification
- 12: Gunshot Residue and Distance Determination
- 13: Toolmark Identification
- 14: Communicating Results
- Resources
Elimination
Home > Bullet Comparison and Identification > AFTE Range of Conclusions > Elimination
As defined in the AFTE Glossary, elimination is a significant disagreement of discernable class characteristics and/or individual characteristics. For fired bullet comparisons, an elimination is normally based on observed differences in any one of the general rifling characteristics.
However, an elimination based on individual characteristics is more complex. If it can be shown that a firearm has not been subjected to significant use or abuse over the period of time following the questioned shooting, the qualitative aspects of the striations (e.g., fineness, coarseness) it produces on fired bullets should remain the same. A difference in these striations indicates an elimination.
Elimination based on individual characteristics requires a detailed knowledge of the history and treatment of the firearm, as well as documentation to support the history. It is the responsibility of the examiner to provide this historical documentation. This type of elimination should be approached with caution. Many experienced examiners have never made such an elimination and the protocols of many laboratories do not allow it.
