Gunshot residue patterns on skin in angled contact and near contact gunshot wounds. PRESENTER: Sommai Sangkaew 51312327. 1. 3. 2. The Importance of Gunshot Residues in Forensic. To identify how the weapon was use.
Gunshot residue patterns on skin in angled contact and near contact gunshot wounds
PRESENTER: Sommai Sangkaew
The Importance of Gunshot Residues in Forensic
KEYWORD > > > > >
The Content of a Bullet.
Type of gun
an object, usually marked
with concentric circles,
to be aimed at in shooting
practice or contests.
Muzzle-Target angle (0˚)
Primer Gunshot Residue Particle identified by Scanning Electron Microscopy
Powder soot zone
Inner powder soot zone
Outer powder soot zone
To study the pattern and density of inner and outer powder soot zones which occur because of :
MATERIAL > > > > >
MATERIAL >> Gun
1) .38Smith and Wesson revolver
2) 9 mm SIG Pistol P210 automatic
3).22 L.R SIG Pistol P210 automatic
MATERIAL >> Gun
MATERIAL >> Target
The distance from muzzle to target is0,5,10,15 and20 mm
The Inner powdersoot zone can be more clearly defined and demarcated than outer powdersoot zone
The Inner powdersoot zones point to the direction ofthe muzzle.
When theMuzzle-target angle is increased, the Inner powdersoot zone will be wider but the density of gunshot residues will decrease
When the length of the barrel increases, the Inner powdersoot zone will be denser and smaller.
When the length of the barrel increases, the entrance hole will be on the rim of the inner powder soot zones.
The different types of the ammunitions will result in different densities of gunshot residues.