Firearms/Shooting Investigations Flashcards

1
Q

What section of the Criminal Code defines a firearm?

A

Section 2

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2
Q

Define a firearm as per the s. 2 CCC definition.

3

A
  1. A barreled weapon from which any shot, bullet or other projectile can be discharged
  2. Includes any frame or receiver of such a barreled weapon and anything that can be adapted for use as a firearm
  3. That is capable of causing serious bodily injury or death to a person
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3
Q

What is ammunition composed of?

6

A
  • Bullet
  • Cartridge case
  • Gunpowder
  • Rim
  • Primer
  • Stamp
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4
Q

Where in the amunition is the primer located?

A

Rim

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5
Q

What is the Pig’s Eye test?

A

A test that determined that at 214 feet per second a BB pellet would penetrate a pig’s eye

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6
Q

What was the significance of the pig’s eye test?

A

Define BB guns as a firearm since it met the threshold of bodily harm.

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7
Q

What is the threshold of a firearm in the Criminal Code?

A

Firearm needs to fire 214 feet per second

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8
Q

What type of firearms require a permit for purchase?

A

Firearms that fire at 500 feet per second or more

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9
Q

Do BB guns require a permit to purchase?

A

No

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10
Q

True or false: If a firearm is used in the commission of an offence, it is automatically defined as a firearm, regardless if it is real or fake.

A

True.

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11
Q

Give examples of where firearms may be found?

4

A

Trafficking
Traffic stops
Found property
Suspects

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12
Q

How can firearms be located after a shooting investigation?

A

Through warrents

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13
Q

Outline the process for processing firearms

7

A
  1. Prove the firearm safe
  2. Photograph
  3. Process the firearm for handler DNA
  4. Process the firearm for fingerprints
  5. Verification of the firearm
  6. Serial number restoration
  7. Expert examination
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14
Q

What courses are offered in Canada for firearm safety?

2

A

Canadian Restricted Firearms Safety Course
Canadian Non-Restricted Firearms Safety Course

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15
Q

What does the acronym ACTS stand for in relation to firearm safety?

A
  • Assume every firearm is loaded
  • Control the muzzle direction at all times
  • keep your Trigger finger off the trigger and out of the trigger guard
  • See that the firearm is unloaded by PROVING it safe
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16
Q

What does PROVE stand for in firearms safety?

A
  • Point in safe direction
  • Remove all ammunition
  • Observe the chamber
  • Verify the feeding path
  • Examine the bore
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17
Q

Outline the process of photographing a firearm.

4

A
  • Overall
  • Midrange
  • Scale/no scale
  • Close-ups of markings and serial numbers
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18
Q

How do you process a firearm for DNA?

A

Swab the textured surfaces: grip of the firearm and grips on the slide

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19
Q

How do you process a cartridge case for DNA?

A

Swab the stamp around the lip of the cartridge case and preserve the case itself for fingerprints

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20
Q

What methods can be used for fingerprinting a firearm and/or cartridge case?

A

CA chamber + powders/dyes

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21
Q

Why are the chances of obtaining a usable fingerprint from a firearm low?

A

Surface and texture

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22
Q

What is used for verification of a firearm?

A

The Firearms Reference Table (FRT)

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23
Q

Who created and maintains the FRT?

A

The RCMP

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24
Q

How does the FRT work?

A

It assigns a number to each individual make/model of a firearm

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25
What characteristics are listed in the FRT? | 7
* Make * Model * Calibre * Barrel length * Number of shots * Type/class * Action
26
What additional information regarding a firearm is provided by the FRT? | 5
* Photographs * Location of serial numbers * Variations of the firearm * Possible firearms that share similar features * Classification: prohibited, restricted, non-restricted
27
What agency offers a course on firearm seral number restoration?
Alcohol Tobacco Firearms and Explosives (ATF)
28
What is serial number restoration?
Aims to bring back the serial number and trace the serial number back to its source.
29
According to Stats Can, what is the change in rate of firearms offenses between 2002 and 2022?
10 times greater
30
According to FATE, what percentage of all traced firearms in ON came from the US?
70%
31
What does FATE stand for?
Firearms Analysis and Tracing Enforcement
32
What is FATE?
A special tracing program specific to ON.
33
What is the goal of FATE?
To trace all firearms used in crimes.
34
What happens once FATE has traced a firearm?
Canadian Polic forward the information to an ATF liaison who then forwards it to the appropriate agents/office in the US.
35
How is serial number restoration possible?
When a serial number is engraved into a metal it not only penetrates the top layer but the subsequent layers below.
36
What is acid selection for serial number restoration based on?
Whether the material is ferrous or non-ferrous.
37
List the ferrous acids. | 3
Davis reagent Turner reagent Frys reagent
38
List non-ferrous acids.
Acidic ferric chloride Ferric chloride
39
What metals are appropriate for use of ferrous acids?
Steel, iron
40
What metals are appropriate for use of non-ferrous acids?
Aluminim
41
What is involved in firearm expert examination?
Re-verifying the firearm
42
What is the goal of a firearm expert examination?
Determine if the firearm meets the criteria of the CCC and that it fires.
43
Why is a firearm expert examination conducted?
To prevent defense from saying that the firearm was not in fireable condition or does not meet the CCC criteria.
44
What type of expert examination is performed on BB/airsoft guns?
Experts conducts a speed test to see whether the weapon meets the criteria of a firearm with the Pig's Eye Test standard.
45
Outline the firing of a Glock. | 6
Trigger pulled Firing pin pulled back Firing pin released, striking primer Expanding gases propel bullet out of the barrel Recoil forces slide back, unlocking barrel Extractor removes spent cartridge from chamber
46
What are the three safeties located on a Glock?
Trigger safety Firing pin safety Drop safety
47
What is the purpose of rifling in the barrel of a Glock?
Causes bullet to spin, stabilizing it and increasing accuracy
48
What are the roles of forensic identification services during a shooting investigation? | 3
1. Document the scene and search for cartridge cases, projectiles, and other evidence 2. Process firearms 3. Processed accused parties
49
What information is included in a briefing of a shooting scene? | 6
1. Lighting conditions 2. Weather 3. Environment 4. Number of cartridges 5. Calibre of the cartridge cases 6. Number of suspects, victims
50
Outline the first three steps to be taken when documenting a scene.
1. Walk the scene 2. Assemble a plan of documentation 3. Begin photographs
51
What methods might be used for shooting scene reconstruction/trajectory analysis? | 3
* Trajectory rods * Scanners * Lasers
52
What does IBIS stand for?
Integrated Ballistics Information System
53
What is IBIS?
A database similar to the Automated Fingerprint Identification System (AFIS).
54
What information regarding cartridge casings is uploaded to IBIS and why?
Each firearm firing pin is unique, so when a firearm is discharged, it makes a unique marking at the bottom of the cartridge case. These markings are uploaded.
55
What information regarding firearms is uploaded to IBIS and why?
When a firearm is discharged, the striations made on the barrel are unique to that specific firearm. Striations uploaded to IBIS.
56
What are grooves of a firearm?
The spiral cuts in a rifled bore.
57
What are the lands of a firearm?
The ridges of metal between the grooves in the rifled bore.
58
Which is more rare to find at a scene, projectiles or cartridge cases?
Projectiles
59
Does CFS take projectiles for IBIS when cartridge cases are found?
No.
60
Why does CFS not accept projectiles if cartridge casings are found?
firing pin impressions, and extractor marks, are more valuable for linking a firearm to a crime. Projectiles, while also bearing markings, are often more damaged and can be harder to compare due to various factors like trajectory, impact, and material deformation
61
What does CFS do if a firearm is located?
Perform test fire
62
What three elements is GSR composed of?
Lead Barium Antimony
63
What indicates GSR?
Presence of all three GSR components.
64
What can GSR tell you? | 5
1. Firearm discharge 2. If someone was within proximity to a firearm during discharge 3. Handling a firearm 4. Handling a fired cartridge case 5. Being with another surface bearing GSR
65
Does the absence of GSR indicate that a person was not within the vicinity of a firearm during discharge?
No
66
What factors cause GSR to diminish? | 4
1. Time 2. Cleaning 3. Washing hands 4. Movement
67
After what timeframe will CFS stop accepting GSR samples? Why?
GSR lasts 8 hours on hands, CFS will not accept samples beyond this time
68
Can GSR last longer on clothing?
Yes
69
How is GSR collected?
Plastic stubs with glue on the end applied in a dabbing motion around suspected areas.
70
What part of the person is swabbed for GSR?
Hands and face
71
What part of vehicles are swabbed for GSR?
Interior window frame Seatbelt Headrest