firearm identification Flashcards
firearms idenfitifcation is concerned with
trying to match a fired bullet or cartridge case to a particular gun
the fire arm and tool marks sections of a forensic laboratory is used for
firearm identification, distance determinations, function tests and serial number restoration
what is the case of a bullet
metal (brass) that contains all the other parts of the round of ammunition
what is the primer of the Bullet
the center of the base of the case in centerfire ammunition and along the edge of the case’s base in rimfire ammunition
it’s important to examine questioned items first in order to determine what
if it has sufficient characteristics to be used in comparison
class characteristics result from
design factors and are determined prior to manufacture. or they were designed that way
sub-class characteristics
they are not made on purpose like class characteristics
you can’t use them for identification purpose like individuals characteristics
individual characteristics
“random imperfections of irregularities of tool surfaces”/ not planned
helps practically exclude of all others
firearms can use class characteristics for
eliminations and grouping items of evidence for further examination
what type of evidence includes footwear impression and tire impressions which relies on class characteristics
impression evidence
the diameter of a bullet can be measured in
millimeters and inches (caliber)
what are the types of marks on a casing
impressed and striated
what is a gauge
the number of lead spheres that are the same diameter of the gun’s barrel that takes to make a pound
Clips and magazines are…
not the same thing
clip
holds the rounds ready to be fed into mag
