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A _____ is a term for someone trained to analyze the physical firearm evidence provided during an investigation.
firearm examiner
Black powder consists of _____, charcoal, and sulfur.
saltpeter
The Bureau of Forensic Ballistics _____.
was established by the FBI in 1923
A teenage boy is brought into a hospital with a gunshot wound to the leg with the bullet lodged within the wound. The police interview the friends who brought the victim to the hospital. The boys claim that their friend was playing with his father's gun and shot himself. The boys tell the police that the accident occurred in a park a few blocks from the hospital. The police secure the scene and CSIs arrive to collect evidence, including spent bullet cartridges. Based on this information, the most likely scenario is that _____.
someone else shot the victim from a distance with .22 caliber pistol
The trajectory of a bullet is a _____ path.
parabolic
Modern firearms are divided into two basic types _____.
long guns and handguns
Wounds caused by the discharge of a firearm is considered _____.
ballistic evidence
A husband and wife are relaxing in the courtyard of their apartment complex. The husband is shot while lying on his back reading. The bullet passes through a sun umbrella staked to the ground before it enters the victim. To determine the exact location of the shooter, investigators first calculate the trajectory of the bullet to be 13.5 degrees. Assuming the tangent of the angle is 0.2400 and the horizontal distance from the bullet hole in the victim to the building is 1,000 inches, the height from which the bullet left the building is _____.
240 inches
On a cartridge, the primer is _____.
visible on the flat end of the cartridge casing
A lead alloy bullet _____.
is hardened with other metals for a higher velocity
Reconstruction of the trajectory or path of the projectile is performed by _____.
ballistic experts
_____ can determine whether weapons have mechanical flaws and were accidently misfired or were purposefully discharged.
Computed tomography (CT) scanning
In 2018, Federal Ammunition created a new formula replacing _____ in primer powder.
toxic lead styphnate with aluminum
The wadding _____.
is composed of plastic or paper material
A breechblock impression is _____.
unique to the firearm providing individual evidence
When collecting and documenting ballistic evidence, _____.
GPS coordinates should be recorded in a photo log
When determining the path of a bullet to identify the height (floor or a building) from which the bullet was shot, use the equation _____ when the angle of the bullet and the horizontal distance to the building where the shooter was located are known.
tangent of angle = opposite side/adjacent side
Some GSR may be driven into the skin of the victim _____.
known as tattooing, occurs if the shooter is within six inches of the victim
Extractor marks are _____ and are produced by mechanisms that remove a spent cartridge from the chamber.
minute scratches on spent cartridges
A .25 caliber bullet _____.
is 25/100 of an inch in diameter
