Internal Ballistics
Tool Marks
Methods of testing
Random ballistics
Random
100
What are the 4 parts of a cartridge?
Bullet,Primer,Casing,Propellant
100
Who is the manufacturer of this cartridge?
WW Super
100
T or F: There are no limitations (issues) using a gun shot residue test in court.
False. There are 3 limitations
1.GSR can be easily tranferred from person-to-person or person-to-object.
2.GSR test will not identify if our suspect shot the gun or was near someone else that did.
3.Things like brake pads and fireworks produce the same particles in GSR and can cause a false positive result.
100
Which category of firearms (we only discussed 2) are criminals more likely to obtain? WHY? (2 reasons)
Handguns. Cheaper and easier to carry/hide/trade
100
What retailer got the most business on Black Friday in 2023?
Amazon
200
What mechanism causes the bullet to spin?
Rifling
200
Make 3 specific observations about this casing.
- RP is the manufacturer
-Caliber is a 9 mm Luger
-Arched Breechface
-Has been fired/spent (there's a firing pin impression)
-Ejector mark is right above the R in RP
200
Definition: The path of the propelled bullet once it leaves the firearm. Vocab word?
Trajectory
200
What are the 2 categories of study in ballistics?
Internal & External
200
What Disney princess does this character belong to?
Sleeping beauty/Aurora
300
What is the primary purpose of rifling within a firearm other than making the bullet spin?
To increase speed and accuracy by putting a spin on the bullet
300
____________can be found along side of a _________, and they are caused by imperfections from within the barrel due to the metal on metal scraping. Therefore this tool is considered __________ (class or indiviudal) evidence.
Striations can be found along side of a bullet, and they are caused by imperfections within the barrel due to the metal on metal scraping. Therefore these tool marks are considered indivudalized evidence.
300
What were the 2 things the serial number tells us about the firearm?
Date (when it was born) & Location (where it was born)
300
Ballistics is the study of _________ and _____________
Projectiles (bullets) and firearms
300
What is the name of the award given to the top scorer in a World Cup tournament?
The Golden Boot
400
Fill in the blanks within the sequence below.Think about the order in which the mechanisms occur.
Trigger is pulled and the hammer comes forward. This initiates the (1)_____ to hit the (2)_______. This causes an explosion when it comes in contact with the (3)_________.Gas pressure from the explosion build and propels the bullet out of the (4) _____.
Trigger is pulled. Hammer comes forward. This initiates the firing pin to hit the primer. This causes an explosion when it comes in contact with the propellant.Gas pressure from the explosion builds and propels the bullet out the barrel.
400
Thinking about all pieces of a cartridge, give 2 examples that could only be used as class evidence
1.Caliber size (diameter: 9 mm, .22, etc)
2.Number of lands and grooves
3.Direction of the twist looking @ lands/grooves
4.Width of the lands and grooves
5.Manufacturer
400
What are the 2 methods that can be used to restore a serial number?
Chemical Milling & Magnetic Particle Restoration
400
Who manages the online data base for ballistics?
ATF: Alcohol,Tobacco, Firearms & Explosives
400
Which 4 presidents are on Mount Rushmore?
George Washington, Abraham Lincoln, Thomas Jefferson, & Theodore Roosevelt
500
Before the casing gets ejected from the firearm, the casing slams backwards creating a tool mark known as? Which can be specifically found on the?
Breechface marks! Primer of the casing!
500
Thinking about a cartidge, Give 3 examples of tool marks that could be used as INDIVIDUAL evidence
1.Breechface marks
2.Firing Pin Impression
3.Extractor Mark
4.Ejector Mark
5.Striations
500
What is the online database for ballistics AND what does it stand for?
NIBIN: National Integrated Ballistics Information Network
500
In terms of ballistics, what method was used to test the magic bullet theory?
Trajectory!!
500
Name that State!
Deleware!!
