What is sometimes left on the shooters clothing after a shootout?
Gun powder residue.
100
What is considered a projectile in ballistics?
Anything that leaves the shooters hand. Specifically the bullet.
100
What does ballistics mean?
The study of guns and projectiles.
100
What does a ballistics vest do?
It is bullet proof.
100
What two things provide the mechanism needed to deliver the explosive charge from the primer powder to the gun powder?
Anvil and Flash hole
200
What is the most occurring evidence at a shoot out?
Bullets from the gun.
200
Where are GSR found?
It can be found on the shooter's hands, and clothing.
Occasionally on the victim.
200
Who created the first gunpowder?
The Chinese in the 14th Century
200
What is Ballistics gels use?
To see how projectiles interact with the human body.
200
Define caliber and give an example.
a measure of the diameter of the cartridge.
Ex: .22, .25, .357, .38, .44, .45
300
How can you determine whether the wound is an entrance or exit wound?
By the size, or whether or not fibers are imbedded in the wound
300
Write the mathematical formula for determine the trajectory of a shooter's bullet.
Distance to window = Distance to shooter (c)
--------------------- --------------------------
Distance along horizon Distance toi side of building
300
When were the first bullets matched to show someone had been at a crime scene?
1929
300
Why would someone use a ballistic soap instead of a ballistic gel?
Gels collapse after the shooting, where the bullets path stays open in a ballistic soap.
300
What is the difference between the bullet and the cartridge?
Bullet is the metal projectile. Cartridge includes the bullet, but also includes primer powder, gun powder, and some sort of casing material.
400
At a crime scene what is one of the three things that the expert can concur from the bullet?
The angle of the shooter, where the shooter was, and the type of gun.
400
What are the 2 major forces acting on a bullet once it is fired?
The forward force of the gunshot, and the downward force of gravity.
400
Which person is credited for creating the modern firearm?
Henri-Gustave Delvine
(pg. 493 "Did you know")
400
What kind of ballistics equipment is used to measure the distance a bullet could travel (to see if it could go though multiple people)? This is one of the oldest types of ballistic tests.
Pine board test.
400
How can the rifling in guns of the same model be unique?
Because the tools used to make the rifling in the guns barrel wears the metal differently in each gun. Each is unique - like a fingerprint.
500
What happens when a bullet travel through a victims body?
It can pass through the victim which will cause the bullet to starting tumbling (yaw), which causes considerable damage.
It can also lodge in the victims body.
500
What does the primer powder do?
The mixture that initiates the contained explosion that pushes the bullet down the barrel.
500
In 2000, what network revolutionized ballistics for law enforcement?
NIBIN (National Integrated Ballistics Network)
500
This is one of the most important investigative tools around, as it allows for high quality comparison matching.
Databases
or
Computers
500
Describe breechblock markings, firing pin markings, and extractor/ejector markings.