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Impression Evidence
Impression Evidence ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
Shoe Print Case ,[object Object],[object Object],[object Object],[object Object],[object Object]
 
 
 
 
Firearms and Ballistics
How a gun works
Four Components of Ammunition ,[object Object],[object Object],[object Object],[object Object],[object Object]
Ammunition
Ammunition
PREMIUM LOAD with SHOTCUP Pellets do  not contact bore
 
 
Some problems
Stable vs. Instable  Projectile Flight
Rifling
 
 
 
[object Object],[object Object],[object Object]
 
The match on the bullet
Gunshot Residue
Source of Gunshot Residue ,[object Object],[object Object],[object Object]
Primers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Formation of the Particle ,[object Object],[object Object]
Inside a GSR kit ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Examination ,[object Object],[object Object],[object Object],[object Object],[object Object]
Positive: What does it mean? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Negative: What does it mean? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Bullet Trajectory
Projectile Penetration ,[object Object],[object Object],[object Object],[object Object]
Definitions  ,[object Object],[object Object],[object Object],[object Object]
 
 
 
Shotgun Pellet Patterns In General…. For every 1” across = 1 Yard from Muzzle  7” Muzzle to Target = 7 Yards
Pellet Pattern Diameter vs. Range Orthogonal Impacts d d d
Non-Orthogonal Pellet Patterns sin -1  (d/D) = incidence angle
Orthogonal Strikes No. 4 Buck 12-ga. d = 7 in.
45 0  Incident Angle with No. 4 Buck, 12 ga. d = 7 in. d/D = 0.67 Sin -1  = 42 0 Same  Range as previous shot
 
 
 
 
 
 
 
Everything from Midterm Plus Ballistics Ammo components Chemicals Rifling Striations GSR What it means Trajectory Penetration Perforation Shotgun 1” for 1 yard Casings Glass – 2 shots which one first Difference between class and individual characteristics Blood Spatter Definitions Formula LVIS MVIS HVIS Tests Eyewitness Polygraph 3 measurements Physiological changes Heart  Respiration Perspiration Reaction Eyes Cotton mouth Butterflies

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