Ballistics
Basics
Basics
The science of analyzing firearm usage in a crime.
What is ballistics?
This is the most common encountered type of bullet
What is the lead round nose?
This is the portion of the casing that ignites the gunpowder
What is the primer?
Striations usually form on this part of the ammunition.
What is the bullet?
The windshields of cars manufactured in the United States are constructed from _____________ glass.
What is laminated?
Identify two things ballistics can tell investigators?
What is the type of firearm used, caliber, # of bullets, where shooter was standing, angle of impact?
This type of gun can be held and shot with one hand.
What are hand guns?
Where are breech face markings found?
What are on the cartridge/casing?
These are the tiny particles expelled from a firearm when it is fired
What is gunshot residue?
Which method is used to determine the refractive index of small glass fragments?
What is the submersion method?
This includes primer powder, gunpowder, the bullet, and the casing material that holds them all together
What is the cartridge?
This type of weapon will fire and reload automatically, and one pull of the trigger equals one shot fired.
What is a semi-automatic weapon?
The headstamp can tell investigators two things. What are they?
What is caliber/gauge and manufacturer?
True or false? Entrance wounds are typically larger than exit wounds.
What is false?
Circular cracks that form around the point of impact when a force is applied to a glass pane.
What are concentric fractures?
The spiral patterns of lands and grooves inside the barrel of a gun is called:
What is rifling?
In long guns, the larger the gauge, the _________ the barrel
What is smaller?
Firing pin impressions are _______ evidence.
What is individual?
The FBI and ATF created a national firearms and projectiles database called:
What is NIBIN?
Identify one scenario when glass evidence may be classified as individual evidence.
What is when the glass fragment matches the sample exactly (fit together like a puzzle).
The caliber of a cartridge is a measure of the diameter of the bullet and provides information about the size of the gun. Is a 0.38 SMALLER or LARGER than a 0.45?
Smaller
The part of a gun that absorbs the force of the casing as it moves in the opposite direction of the projectile, thus protecting the shooter, is the ____
Extractor
Full metal jackets are most often used in _________ weapons.
What are military?
Who makes the final determination about whether two bullets were fired from the same gun?
Who is the ballistics/firearms examiner?
If a piece of glass submerged in a liquid shows a halo outside of the perimeter of the glass (in the liquid), what does that indicate?
What is the liquid has a higher refractive index?