Son of a gun
Well, shoot!
Going ballistic!
Gun Basics
How far was the barrel?
100
Name one way ballistics evidence helps police answer questions.
what type of firearm was used?
what was the caliber of the bullet?
how many bullets were fired?
where was the shooter standing?
what was the angle of impact?
has this firearm been used in a previous crime?
100
patterns of lands and grooves come which part of the firearm?
barrel
Extra!!! Are these lands and grooves individual or class evidence to the gun? (worth 100 points)
100
The firing pin leaves a mark on this
the primer
100
The legal age to purchase a handgun according to federal law.
21
100
True or False, The entrance wound is larger than the exit wound.
False
200
The diameter of its bullet and is included with the name of the manufacturer on the headstamp.
Caliber
Extra!!! What caliber is a Colt 45? (100 points)
200
__________________on shooters can help investigators identify a suspect.
gunshot residue
Extra!!! T or F It is easy to wash GSR off of clothes and hands (100 points)
200
The marking from this part of the gun is found on the side of the casing after it has been pulled out of the gun.
Extractor
200
The scientific analysis or interpretation of all fire arm related evidence with the purpose of interpreting and establishing the facts in a shooting related crime.
Forensic Ballistics
200
Large concentration of gunpowder residue near the entrance of the wound
9ft or less
300
The projectile that is fired when a firearm is discharged
bullet
300
The part of the gun that hits the primer causing the bullet to be fired
firing pin
300
The three patterns left from the Breech Face
Arched, Circular, and Parallel
300
The most import feature on a firearm
Safety
300
Very little to no gun shot residue found near the entrance wound of the bullet.
30ft or more
400
The ridges and depressions found on the inside of a firearm's barrel that are created when the firearm is manufactured
lands and grooves
400
What type of bullet:
spreads or mushrooms on impact
causes additional damage to target
inhibits penetration
Hollowpoint
400
What are the two types of projectiles from a shot gun
slug and shot (pellets)
400
This is used to restore a serial number that has been altered
Etching Reagent
400
Burn marks left on the skin
Barrel just off the skin
500
The spiral pattern on a fired projectile made by the lands and grooves in the barrel of a firearm
Rifling
500
What type of bullet:
primer compound circumferences the base
- used primarily in a .22 caliber
Rim Fire
500
Identifies the caliber and manufacturer.
headstamp
500
This is always the first thing done when a firearm is found at a crime scene
Unload it
500
Describe the path of the bullet in the Magic Bullet Case Study
Originates Outdoor fire range, double fire during recoil, passes under last set of baffles and over berm, through Aluminum siding, through storage room, breaks through 2nd wall into air gun range, skids along ceiling tile, penetrates a plaster wall, then enters Trey Cooley's head.