Ballistic exam review sheet

Question 1

Identify the different database used by forensics scientists that involved ballistics and impressions

Answer 1

NIBIN, Drugfire, and IBIS

Question 2

Identify ways firearms and bullets can give individual evidence

Answer 2

ejector mark, breechblock impression, firing pin,

Question 3

What is the difference between class and individuals evidence

Answer 3

Class evidence= a group of people or thing
Individual evidence= specific person or thing

Question 4

Describe the different ways that ballistics and firearms can give investigators class evidence

Answer 4

caliber, length, number and direction of lands and grooves

Question 5

What is the difference between lands and grooves. what are they for, how can they be used to match a bullet to a specific gun?

Answer 5

Grooves: spiral cuts
Lands: raised parts that are inside the barrel that are the metal between the grooves
Purpose: to give the bullet a spin as it travels to allow it to be stable and straight

Question 6

What are the two ways a person can test for GSR, and what can the detectives learn from it

Answer 6

1. Sodium Rhodizonate: Pink color that will occur after spraying the sample with sodium Rhodiozate and the di water to detect lead
2. Griess test- used to detect nitrates on clothing and distance of muzzle from garments

Question 7

What can affect the amount of GSR present

Answer 7

Barrel length, caliber, type of ammunition, type and condition of weapon

Question 8

What are the chemicals they test for in GSR tests

Answer 8

Nitrates,lead, barium, antimony

Question 9

What makes up a round

Answer 9

casing, bullet, primer, powder

Question 10

Major players in St vday massacre

Answer 10

Morgan bugs, al capone, calvin goddard