Firearms

Front 1

The original part of the bore left after rifling grooves are formed...

Back 1

Lands

Front 2

The diameter of a rifled barrel

Back 2

caliber

Front 3

The striations formed on a bullet are impressed into the barrel's surface are _________ characteristics

Back 3

Individual

Front 4

The sinlge most important instrument for comparing bullets is the?

Back 4

Comparison microscope

Front 5

If bullets were fired in succession from the same weapon, all the individual characteristics would always be identical? T or F

Back 5

False

Front 6

It is (always, sometimes) possible to determine the make of a weapon by examining a bullet it fired.

Back 6

sometimes

Front 7

A shotgun has a ______ barrel

Back 7

smooth

Front 8

The diameter of a shotgun barrel is expressed by the term__?

Back 8

Gauge

Front 9

Shotgun pellets can be individualized to a single weapon? (T F)

Back 9

False

Front 10

A cartridge case (can/cant) be individualized to a single weapon

Back 10

can

Front 11

The shape of the indention caused by the firing pin may be a characteristic unique to a firearm. (TF)

Back 11

true

Front 12

The distribution of gunpowder particles and other discharge residues around a bullet hole permit an approximate determination of the distance from which the gun was fired. (TF)

Back 12

True

Front 13

Without the benefit of a weapon, an examiner can make an exact determination of firing distance (TF)

Back 13

False

Front 14

One test method for locating powder residues involves transferring particles embedded on the target surface to a chemically treated photo paper (TF)

Back 14

True

Front 15

Current method for identifying a shooter rely on the detection of ____ residues on the hands

Back 15

primer

Front 16

Elements on a shooters hands after firing a weapon are _____ and ______

Back 16

barium and antimony

Front 17

Firings with all types of ammunition can be detected by hand swabbings w/ nitric acid? (TF)

Back 17

true

Front 18

Restoration of serial numbers is possible because in the stamped zone the metal is placed under a permanent strain that extends beneath the original numbers? (TF)

Back 18

True

Front 19

It (Is/isnt) proper to insert a pencil into the barrel in picking up a weapon

Back 19

isnt

Front 20

recovered bullets are initialed either on the ___ or ____ of the bullet

Back 20

base/nose

Front 21

Cartridge cases are best marked at the base of the shell (TF)

Back 21

false

Front 22

The clothing of the victim of a shooting must be handled to prevent disruption of _____ around the bullet holes

Back 22

GSR

Front 23

A ___ is any impression caused by a tool coming in contact with another object

Back 23

tool mark

Front 24

Tool marks compare only when a sufficient number of ___ match bw the evidence and test markings

Back 24

striations

Front 25

Area of barrel that makes contact with the bullets is what?

Back 25

lands

Front 26

area of barrel that doesnt make contact with the bullets is the?

Back 26

grooves

Front 27

class characteristics of spent bullets are what?

Back 27

number of lands and grooves

Front 28

Individual characteristic of bullets are what?

Back 28

striations

Front 29

Part of bullet with evidential value is what?

Back 29

side (striations)

Front 30

Cartridge cases are best marked at the base of the shell (TF)

Back 30

false

Front 31

part of casing with evidential value?

Back 31

base/rim where firing pin hits

Front 32

The clothing of the victim of a shooting must be handled to prevent disruption of _____ around the bullet holes

Back 32

GSR

Front 33

A ___ is any impression caused by a tool coming in contact with another object

Back 33

tool mark

Front 34

Tool marks compare only when a sufficient number of ___ match bw the evidence and test markings

Back 34

striations

Front 35

Cartridge cases are best marked at the base of the shell (TF)

Back 35

false

Front 36

Area of barrel that makes contact with the bullets is what?

Back 36

lands

Front 37

The clothing of the victim of a shooting must be handled to prevent disruption of _____ around the bullet holes

Back 37

GSR

Front 38

area of barrel that doesnt make contact with the bullets is the?

Back 38

grooves

Front 39

A ___ is any impression caused by a tool coming in contact with another object

Back 39

tool mark

Front 40

class characteristics of spent bullets are what?

Back 40

number of lands and grooves

Front 41

Tool marks compare only when a sufficient number of ___ match bw the evidence and test markings

Back 41

striations

Front 42

Individual characteristic of bullets are what?

Back 42

striations

Front 43

Area of barrel that makes contact with the bullets is what?

Back 43

lands

Front 44

Part of bullet with evidential value is what?

Back 44

side (striations)

Front 45

area of barrel that doesnt make contact with the bullets is the?

Back 45

grooves

Front 46

part of casing with evidential value?

Back 46

base/rim where firing pin hits

Front 47

class characteristics of spent bullets are what?

Back 47

number of lands and grooves

Front 48

Individual characteristic of bullets are what?

Back 48

striations

Front 49

Part of bullet with evidential value is what?

Back 49

side (striations)

Front 50

part of casing with evidential value?

Back 50

base/rim where firing pin hits

Front 51

Part of the gun that leaves an impression on the base of the casing is what?

Back 51

firing pin

Front 52

Part of the gun that leaves an impression on the rim of the base/casing?

Back 52

ejector

Front 53

Shotguns shot this..?

Back 53

shells

Front 54

Part of the shell that allows for powder analysis?

Back 54

wadding

Front 55

Part of the gun that leaves an impression on the base of the casing is what?

Back 55

firing pin

Front 56

part of the shell that has evidential value?

Back 56

base/rim

Front 57

Idenifying who shot a gun relies on its detection on one's hands of what?

Back 57

primer

Front 58

Part of the gun that leaves an impression on the rim of the base/casing?

Back 58

ejector

Front 59

Shotguns shot this..?

Back 59

shells

Front 60

Location on a bullet where an officer would initial

Back 60

base/cone top/bottom

Front 61

Location on the shell where the officer would initial?

Back 61

towrad the mouth

Front 62

Part of the shell that allows for powder analysis?

Back 62

wadding

Front 63

Part of the gun that leaves an impression on the base of the casing is what?

Back 63

firing pin

Front 64

Hole made by a bullet penetrating the target?

Back 64

bullet wipe

Front 65

part of the shell that has evidential value?

Back 65

base/rim

Front 66

Part of the gun that leaves an impression on the rim of the base/casing?

Back 66

ejector

Front 67

What are the types of handguns?

Back 67

revolver and semi automatic

Front 68

Idenifying who shot a gun relies on its detection on one's hands of what?

Back 68

primer

Front 69

Shotguns shot this..?

Back 69

shells

Front 70

Location on a bullet where an officer would initial

Back 70

base/cone top/bottom

Front 71

Part of the shell that allows for powder analysis?

Back 71

wadding

Front 72

Location on the shell where the officer would initial?

Back 72

towrad the mouth

Front 73

part of the shell that has evidential value?

Back 73

base/rim

Front 74

Idenifying who shot a gun relies on its detection on one's hands of what?

Back 74

primer

Front 75

Hole made by a bullet penetrating the target?

Back 75

bullet wipe

Front 76

Location on a bullet where an officer would initial

Back 76

base/cone top/bottom

Front 77

What are the types of handguns?

Back 77

revolver and semi automatic

Front 78

Location on the shell where the officer would initial?

Back 78

towrad the mouth

Front 79

Hole made by a bullet penetrating the target?

Back 79

bullet wipe

Front 80

What are the types of handguns?

Back 80

revolver and semi automatic

Front 81

Revolver

Back 81

bullets are indidually inserted into the cylinder

Front 82

semi automatic

Back 82

bullets are stored in a clip that can be changed out

Front 83

Rifle

Back 83

barrel is a different size than handguns and it has a butt stock

Front 84

shotguning

Back 84

looks like a rifle, but doesnt have lands and grooves, smooth barrel

Front 85

Gun barrel/bullets

Back 85

inner surface of the gun barrel leaves markings on the bullet knows as striations

Front 86

lands

Back 86

raised portion b/w the grooves in a rifled bore

Front 87

grooves

Back 87

the cut, or low lying portions b/w the lands in a rifled bore

Front 88

Rifling

Back 88

spiral gooves in a firearm barrel that are designed to put a spin on the bullet, allowing for greater distance and accuarcy

Front 89

Bullets

Back 89

copper or brass. striations are evidential value

Front 90

Casings

Back 90

copper/brass--houses gun powder and primer. evidence-base where the firing pin of handgun or rifle made contact w/ the casing or contact by the ejecter of the handgun or rifle

Front 91

Shells-shotgun

Back 91

brass base, paper or plastic sleeving. contains wadding. evidence-base where the firing pin of the shotgun made contact w/ the shell or contact by the ejector

Front 92

GSR

Back 92

carbon, dirt, lubricant, primer lead.

Front 93

Primer

Back 93

ignties powder, gasses expand forcing the bullet to be propelled forward

Front 94

Contact wounds

Back 94

typically have soot on the outside of the skin, and a torn ragged wound of the skin due to the gasses

Front 95

Intermediate or close range wounds

Back 95

wide zone of powder stippling, but dont have a torn ragged wound

Front 96

Distant range

Back 96

lack powder stippling and have a hole the size of the caliber of the projectile fired

Front 97

sequence of fire

Back 97

establish the sequence the bullets were fired. a fracture line won't crosee a pre existing one

Front 98

GSR is classified by?

Back 98

color, particle, size and shape. may have to test hands

Front 99

Serial Numbers

Back 99

stamped area is the zone of strain.

Front 100

Place firearms in _____ containers

Back 100

seperate

Front 101

if semi automatic or automatic weapon, make sure to check for a ___ even after removing the ____

Back 101

bullet, clip

Front 102

Clips have ___ surfaces. Good place for _____

Back 102

smooth, fingerprints

Front 103

Tag the firearm with ___?

Back 103

serial #, make, model, investigators initials

Front 104

Drugfire

Back 104

created by the FBI and is a database that focuses on the comparison of images of cartridge casings

Front 105

IBIS

Back 105

developed for atf, and compares images of spent bullets and cartridge casings

Front 106

NIBIN

Back 106

national imagery database. combined efforts of FBI and ATF