A discipline mainly concerneed with determining wheterh a bullet or cartridge was fired by a particular weapon; it is not to be confused with ballistics, which is the study of a projectile in motion
The Spiral grooves formed in the bore of a firearm barrel that impart spin to the prjectile when it is fired
The diameter of the bore of a rifled firearm; the caliber is usually expressed in hundreadths of an inch or millimeters
Size designation of a shotgun, originally the number of lead balls with the same diameter as the barrel that would make a pound.
The mechanism in a firearm by which a cartridge of a fired case is withdrawn from the chamber.
The Process of determining the distance between the firearm and a target, usually based on the distribution of powder patterns or the spread of a shot pattern.
An interior construction placed at or near the muzzle end of a shotguns barrel to control shot dispersion.
If bullets were fired in succession from the same weapon, all the individual characteristics would always be identical
The automated firearms search system developed by FBI and ATF as a unified system incorporated both DRUGFIRE and IBIS technologies available in prior years is known as
Tool marks compare only when a sufficient number of ______ match between the evidence and test markings.
a photograph and liquid silicone cast
Objects bearing tool marks should be submitted intact to the crime lab or a ____________________ _______________
photography and casting.
Shoe and tire marks impressed into soft earth at a crime scene are best preserved by
Normal deviations found between repeated specimens of an individuals handwriting or any printing device.
The removal of writing, typewriting, or printing from a document; it is normally accomplished by either chemical means or an abrasive instrument.
A property exhibited by some dyes that emit infrared light when exposed to blue-green light.
The blotting out or smearing over of writing or printing to make the original unreadable.
Any document that has become darkened and brittle through exposure to fire or excessive heat.
Impressions left on papers positioned under a piece of paper that has been written on.
Duration, Balance, Wording, Pronouns, Placements, Social Intro, emotions, omissions, time, connections, editing,