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CHARACTERS OF FIREARM INJURIES (WOUND)

CHARACTERS OF FIREARM INJURIES (WOUND). 1- Loss of substance This loss depends on the size of missile, velocity and distance of firing. 2- Presence of two wounds inlet and exit (grazing of the bullet) 3- Possible presence of associated of projectile (Powder marks)

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CHARACTERS OF FIREARM INJURIES (WOUND)

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  1. CHARACTERS OF FIREARM INJURIES (WOUND)

  2. 1- Loss of substance This loss depends on the size of missile, velocity and distance of firing. 2- Presence of two wounds inlet and exit (grazing of the bullet) 3- Possible presence of associated of projectile(Powder marks) 4- Beveling occurs in flat bones .

  3. DIFFERENCE BETWEEN INLET & EXIT

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

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

  6. point blank firing (0-15) • The inlet is cross shaped • Everted • Burnt (flam). • Blackening (smoke) • Tattooing (unburned particles).

  7. In contact firing • Burning take the shape of the muzzle, • Minimal blackening and tattooing. Why

  8. Medico legal importance of powder marks: 1- Diagnosis of fire arm injuries 2- Differentiation between inlet and exit 3- Identification the type of powder used 4- Estimation the distance of firing 5- Determination the direction of firing

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

  10. Suicide , homicide or accidental • Circumstantial evidence • Scene of the crime • Examination of the victim • Sex - Victims clothes - Cadaveric spasm • Blackening of the victim's fingers • Signs of resistance

  11. 4- Examination of the wound • Site of the wound • Number of wounds • Distance of firing 5 -Examination of the weapon • presence of the weapon • Type of weapon Short – long 6- Examination of the suspected assailant

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