9CHARACTERS OF FIRE ARM INJURIES (WOUND).ppt

Firearm injuries

1. CHARACTERS OF FIREARM CHARACTERS OF FIREARM
INJURIES (WOUND)INJURIES (WOUND)

2. 1- Loss of substance 1- Loss of substance
This loss depends on the size of missile, velocity and distance of firingThis loss depends on the size of missile, velocity and distance of firing..
22 - -Presence of two wounds inlet and exitPresence of two wounds inlet and exit
((grazing of the bulletgrazing of the bullet))
33 - -Possible presence of associated of projectilePossible presence of associated of projectile
(Powder marks)(Powder marks)
4- Beveling occurs in flat bones .4- Beveling occurs in flat bones .

4. DIFFERENCE BETWEEN INLET & EXITDIFFERENCE BETWEEN INLET & EXIT
inletinletexitexit

SizeSizeSmall Small Large Large

Loss of Loss of
substance substance
MoreMore LessLess

Powder Powder
marksmarks
++++ ++++NONO

EdgeEdgeInvertedInverted EvertedEverted

Beveling Beveling InternalInternal EternalEternal

5. Factor affecting the shape of the FA woundFactor affecting the shape of the FA wound
1- The type of the weapon 1- The type of the weapon
2- Distance of firing 2- Distance of firing
3- Direction of firing. 3- Direction of firing.
4- Site of the wound 4- Site of the wound
5- Type and amount of the powder 5- Type and amount of the powder

6. Estimation of the distance of firing:
1- 1- In cases of short distance (near firing):In cases of short distance (near firing):
Powder marksPowder marks
II- In cases of long distance (far firing):II- In cases of long distance (far firing):

The estimation of distance is based on the The estimation of distance is based on the
extent of dispersion of shotsextent of dispersion of shots

In cases of bullets it is estimated by the In cases of bullets it is estimated by the
amount of penetration amount of penetration

7. point blank firing
(0-15)
point blank firing
(0-15)

The inlet is cross shapedThe inlet is cross shaped

EvertedEverted

Burnt (flam).Burnt (flam).

Blackening (smoke)Blackening (smoke)

Tattooing (unburned particles).Tattooing (unburned particles).

9. In contact firingIn contact firing

Burning take the shape of the muzzle,Burning take the shape of the muzzle,

Minimal blackening and tattooing.Minimal blackening and tattooing.
Why Why

12. Medico legal importance of powder marks:
1- Diagnosis of fire arm injuries1- Diagnosis of fire arm injuries
2- Differentiation between inlet and exit2- Differentiation between inlet and exit

3- Identification the type of powder used 3- Identification the type of powder used
4- Estimation the distance of firing4- Estimation the distance of firing

5- Determination the direction of firing 5- Determination the direction of firing

13. Identification of the weapon used

Finger printsFinger prints

Smell of burnt powder Smell of burnt powder

Type and bore compared with Type and bore compared with
projectile extracted form the victimprojectile extracted form the victim

Experimental examination of the Experimental examination of the
suspected weapon suspected weapon

Empty cartridge at the scene of the Empty cartridge at the scene of the
crime crime

14. Suicide , homicide or accidentalSuicide , homicide or accidental
1.1.Circumstantial evidenceCircumstantial evidence
2.2.Scene of the crime Scene of the crime
3.3.Examination of the victim Examination of the victim

Sex - Victims clothes - Cadaveric spasm Sex - Victims clothes - Cadaveric spasm

Blackening of the victim's fingers Blackening of the victim's fingers

Signs of resistance Signs of resistance

15. 44 - -Examination of the woundExamination of the wound

Site of the woundSite of the wound

Number of wounds Number of wounds

Distance of firing Distance of firing
5 -Examination of the weapon5 -Examination of the weapon

presence of the weaponpresence of the weapon

Type of weapon Short – longType of weapon Short – long
6- Examination of the suspected assailant6- Examination of the suspected assailant