Reference no: EM13865729
Visit the following web site on Tool Marks and Firearm Evidence or copy and paste the following URL: https://www.fbi.gov/about-us/lab/forensic-science-communications/fsc/april2000/schehl1.htm/schehl2.htm
Watch the video titled Firearms https://www.youtube.com/watch?v=BhAN8h34ZoA&index=4&list=PL57ED4FF6B97F66ED
Complete the following writing assignments:
Part A.) Answer the following questions using the FBI web site listed above:
1. Explain the procedures for processing and recovering tool mark evidence from the following:
- Object that can be moved
- Fixed object that cannot be moved
2. What type of material is generally used to cast tool marks?
3. Explain the processes for comparing evidence tool marks and control marks made with the suspect tool.
HINT: Explain all the processes a forensic technician in a lab setting will use to document the evidence and the procedures used for comparing tool mark evidence. Information on these processes is found in your textbook.
4. What are the four basic components of a cartridge?
HINT: A firing pin is not part of a cartridge.
5. Handgun and rifle barrels have helical grooves, referred to as rifling, on the interior of their barrels, what are the purposes of rifling barrels of firearms?
6. The spiraling depressed areas inside the barrel of a handgun or rifle are referred to as what?
7. The spiraling raised areas between the grooves inside the barrel of a handgun or rifle are referred to as what?
8. Explain how the caliber of a barrel is determined (measured).
9. Explain how the caliber of a recovered projectile is determined (measured).
Part B.) Click on the link FirearmsID.com (https://www.firearmsid.com/A_FirearmsID.htm) and answer the following questions:
1. Explain the identifying features that can be found on a projectile (bullet) fired from a rifled handgun or rifle.
2. List and discuss five identifying features of discharged ammunition (referring to impression evidence found on spent cartridge casings). Your discussion should include how the marks are created.
Part C.) To help with the above assignment and your assessments, review the YouTube videos below."
Firearm Evidence - Introduction
https://www.youtube.com/watch?v=igefAO53DXc
Firearm Evidence - Session 1A
https://www.youtube.com/watch?v=wrFfFWmkAYY
Firearm Evidence - Session 1B
https://www.youtube.com/watch?v=HoSfMNgcL40
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