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Forensics Ballistics

QuestionAnswer
What is Forensic Ballistics The Scientific analysis or interpretation of all ballistic related evidence with the purpose of the interpreting and establishing facts and evidence in a shooting crime
Main difference between Long Guns and Handguns Long Guns need two hands to operate correctly, handguns only need one, long guns are normally rifles and shotguns while handguns would include pistols and revolvers.
Things Forensics Ballistics can be used for Identifying the Type of Firearm, The cartridge used, Determining the bullet trajectory, Using striations to match bullet/casing to gun, The Type of shooting, Test for the presence of primer.
Two characteristics bullets are collected for Caliber, Rifling impression
What are striations Linear grooves or scratches left on a bullet due to being fired
Biggest problem in making an identification in bullets Few Evidence bullets are submitted fully intact
How are firing pin impressions created When a firing pin strikes the primer it leaves a mark
How is a comparison microscope used to compare cartridge cases It aligns the cartridge cases next to each other to be able to easily see everything under the magnification lens
What is GSR Gunshot residue
What is in GSR Lead, Barium and antimony
How would an investigator collect GSR Swabbing the hands and clothing of an individual
List individual evidence of cartridges Rifling, striations
Class evidence of cartridges Caliber, Head stamp and GSR
How is residue significant in forensic investigations It can be used as sequential evidence based on complementary factors, matching the shooters position, and matching the residue composition of a suspect to a specific firearm
Three challenges with gunshot residue analysis It can be easily washed off and removed, potential cross examination , many lab don't accept swabs older than 2 hours
Created by: Matthew Stephens
 

 



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