External Examination

Initial Steps & ID - Case Kickstart

• Preliminaries:
  • Verify consent & inquest papers (e.g., FIR under Section 173 BNSS, inquest report under Section 176 BNSS).
  • Photography: undisturbed, then detailed.
  • Chain of custody initiated.

    ⭐ Chain of custody for clothing and samples is paramount.

• General Survey & Clothing:
  • Note general condition (e.g., well-nourished, emaciated).
  • Clothing: document layers, condition (tears, stains), labels. Remove carefully.
  • Distinguish Postmortem Staining (Livor Mortis) vs. Bruising (Contusions).
    • PM Staining: begins fixing 4-6 hrs, fully fixed 8-12 hrs (variable); dependent areas.
    • Bruising: no blanching; vital reaction, swelling, color changes.
• Identification Parameters:
  • Ancestry/Population group, Sex, Apparent Age.
  • Build, Nutritional status.
  • ID features: scars, tattoos (design, location), moles, deformities.
  • Dental exam, DNA profiling for positive identification.
  • CT/MRI imaging for complex injuries, 3D reconstruction if available.
• Natural Orifices:
  • Examine eyes, ears, nose, mouth, urethra, vagina, anus.
  • Note discharge, foreign bodies, injuries.

PM Changes - Death's Diary

• Algor Mortis (Cooling):
  • Rate: $\approx 1.5^{\circ}C/hr$ (1st few hrs), then $\approx 1^{\circ}C/hr$.
  • Factors: Ambient temp, clothing, body fat, cause of death.
• Livor Mortis (Hypostasis/Staining):
  • Timing: Appears 0.5-2 hrs, visible 2-4 hrs, fixed 8-12 hrs (approximate guidelines; significant variability based on environmental factors).
  • Sites: Dependent areas; spares pressure points.
  • Color: Purplish-blue. Cherry-red (CO, Cyanide), Brown (Nitrates).
  • Tardieu spots: Petechiae in livid areas (intense congestion).
• Rigor Mortis (Stiffening):
  • Sequence: Nysten's Law (Eyelids/Jaw → Neck → Trunk → Limbs). 📌 JNAL (progression).
  • Timeline (Rule of 12): Starts 1-2 hrs, full 12 hrs, lasts 12 hrs, passes 12 hrs (guidelines only; interpret with all available evidence).
  • Simulants: Cadaveric spasm (instantaneous, vital), heat/cold stiffening.
• Decomposition:
  • Putrefaction: Greenish RIF (12-24 hrs), marbling (veins, 24-36 hrs), gases/bloating (36-48 hrs).
  • Adipocere: Waxy; moist/anaerobic (e.g., burial); weeks-months.
  • Mummification: Dry, desiccated; dry/warm/ventilated env.; months-years.

⭐ Cherry-red discoloration in Carbon Monoxide and Cyanide poisoning is a classic finding for Livor Mortis. Classification follows ICD-11 standards for medico-legal reporting.

Injury Inspection - Surface Stories

Injury Classification & Key Features:

- **Individual variation significant** - age, health, location affect healing timeline
- **Forensic age estimation** based solely on color is **imprecise** and requires corroborating evidence

• Specific External Signs: Hesitation marks (suicidal attempts), Defence wounds (victim resisting attack), Fabric imprints (impact pattern).
• Documentation: Record Number, Size, Shape, Site, Direction, Age with detailed anatomical descriptions, standardized photography with scale, body diagrams, and digital documentation systems.

⭐ A contusion (bruise) exhibits vital reaction (e.g., swelling, progressive color changes), confirming it occurred ante-mortem.

High‑Yield Points - ⚡ Biggest Takeaways

• Identification is paramount: note features, scars, tattoos, clothing.
• Estimate time since death via rigor, livor, algor mortis, and decomposition.
• Look for manner of death clues: ligature marks, GSW features, stab wound characteristics, defense injuries.
• Distinguish postmortem artifacts from ante-mortem injuries carefully.
• Clothing examination is crucial: note damage, stains, and correlation with injuries.
• Inspect natural orifices for foreign bodies, discharge, or trauma.
• Detailed documentation and photography are legally essential.