Wound Ballistics Dr Ajee Kuruvilla Assoc Prof Forensic

Wound Ballistics Dr Ajee Kuruvilla Assoc Prof Forensic Medicine

A Fired Projectile is accompanied by • • • Flame Hot gases under pressure Soot Burnt particles Unburnt particles Metallic particles

A Fired Projectile is accompanied by Flame- singeing Burnt particles- soot, blackening Unburnt particles- tattooing Bullet’s initial attempt of perforating skin. Abraded collar • Contusion from bullet entering- contusion collar • Dirt/ grease of bullet- dirt/ grease collar • •

REVOLVER/ PISTOL • Muzzle Velocity - 150 - 200 m/sec (revolver) 300 - 400 m/sec (pistol) • Range - 100 m • Extension of flame - 2 - 3 inches (5 - 7. 5 cm) • Extension of smoke - 12 inches (30 cm) • Extension of unburnt

RIFLE • • • Muzzle Velocity - 450 - 1500 m/sec Range - 1000 - 3000 m Extension of flame - 6 – 8 inches (15 -20 cm) Extension of smoke - 12 -18 inches (30 -45 cm) Extension of unburnt powder Particles - 30 -36 inches (75 - 90 cm)

SHOT GUN • • • Muzzle Velocity - 350 - 400 m/sec Range - 300 - 400 m Extension of flame - 6 – 8 inches (15 -20 cm) Extension of smoke - 12 -18 inches (30 -45 cm) Extension of unburnt powder Particles - 30 -36 inches (75 - 90 cm)

RIFLED FIRE ARM INJURIES • Contact Shot: on contact • Close Range: within range of flame & soot - few inches from the muzzle • Near range: within the range of smoke & unburnt powder -1 -3 feet • Distant shot: > 3 feet

FIRE ARM INJURIES • INJURIES PRODUCED BY RIFLED FIREARMS • INJURIES PRODUCED BY SMOOTH BORED FIREARMS (SHOT GUN)

Rifled weapon-Contact Shot (entry wound)

Rifled weapon-Contact Shot