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?
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)
The marking in the center of the primer came from .....
The Firing Pin
According to federal law, how old do you have to be to purchase a handgun?
21
What produces a larger wound? (entrance or exit)
Exit
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)
__________________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)
The three types of Breech Face markings
Arch, Circular, and Parallel
What is the scientific analysis or interpretation of all ballistic related evidence with the purpose of interpreting and establishing the facts in a shooting related crime.
Forensic Ballistics
What type of Gun produced this wound?
shot gun
The projectile that is fired when a firearm is discharged
bullet
Who was responsible for the St. Valentine's Day Masacre?
Al Capone
The markings left on the side of the casing when being removed from the gun was made by the ____
Extractor
Where was Ty Cooley shot and killed?
At a gun range
What Instrument is best when identifying markings on a casing or bullet?
Comparison Microscope
The ridges and depressions found on the inside of a firearm's barrel that are created when the firearm is manufactured
lands and grooves
What type of bullet:
spreads or mushrooms on impact
causes additional damage to target
inhibits penetration
Hollowpoint
What two projectiles are used in a shot gun?
Slug and a Shot
What are the three types of bullets?
Hollowpoint
Round nose
Wadcutter
No star pattern
NO stippling
Barrel burns on skin
Barrel just off the skin
The spiral pattern on a fired projectile made by the lands and grooves in the barrel of a firearm
Rifling
What type of bullet:
maximum penetration
cheapest shape to manufacture
easily loads into chambers
round nose
Identifies the caliber and manufacturer.
headstamp
Name 4 components of ammunition
case, bullet (or projectile), Gun powder, primer, headstamp
Case scenario:
Detective Fuller is called to a shooting crime scene in the Fox Hollow edition of Forney, TX. He notices several bullet casings lying around the male victim. Not all of the bullet cases are of the same caliber. There are 9mm and 45mm caliber bullets at the scene. On the victim, Det. Fuller notices a one gunshot wound to the head with stippling. Unfortunately, the bullet is not inside the victim. The body is sent to the medical examiner. Forensic Pathologist, Dr. Bisquit, examines the wound and determines the shooter had to have been:
inches away