Forensic medicine delivers 3-4 NEET PG questions per paper across MLC procedures, postmortem changes, injuries, and Indian medico-legal law. The high-yield framework:
Sexual assault — POCSO 2012; female examiner; no two-finger test; samples within 96 hours.
Indian law — BNS 2023 replaced IPC 1860; IEA 1872 governs evidence; MTP Act 2021; mandatory reporting.
Forensic medicine sits at the intersection of medicine and law — and for NEET PG, it converts to a heavily fact-based section where dates, time-since-death estimations, classification systems for injuries, and the specific Indian legal frameworks all need cold recall. Recent updates (BNS 2023 replacing IPC 1860, MTP 2021 amendments, POCSO and Mental Healthcare Act provisions) have changed the answer key on legacy MCQs, and examiners have started asking about the new statutes by name.
This NEETPGAI deep dive covers MLC handling, postmortem timeline estimation, mechanical and firearm injuries, asphyxia patterns, sexual assault evaluation, and the Indian medico-legal framework you need at exam fingertip-recall. Pair this with the Forensic Medicine high-yield topics list for rapid revision.
Medico-legal cases (MLC)
A medico-legal case is any case where the attending physician believes legal investigation is needed to establish the cause and circumstances of injury, illness, or death. The first treating doctor — including the casualty officer — has a statutory duty to register and report.
Common MLC categories
Assault, fight, alleged manhandling
Road traffic accidents
Burns (especially in married women — dowry-death suspicion)
Eye changes — Tache noire (drying of sclera) at 2-3 hr if eyes open; corneal opacity at 6-12 hr if eyes open; cloudy at 12-24 hr if closed.
Cadaveric spasm
A separate phenomenon from rigor — instantaneous post-death contraction at moment of death, often clutching an object (weapon, grass during drowning). Indicates intense emotional/physical state at death; medico-legally important for suicide vs homicide.
Mechanical injuries — blunt and sharp force
Blunt force injuries
Injury
Cause
Features
Healing
Abrasion
Friction against rough surface
Loss of superficial epidermis; brush, graze, or imprint patterns
Heals without scar
Contusion (bruise)
Rupture of subcutaneous vessels
Initially red-purple → blue (1-3 d) → green (4-7 d) → yellow (7-10 d) → brown → fades (2 wk)
No scar
Laceration
Tearing of tissue from blunt force
Irregular margins, tissue bridges across wound, hairs intact
Scar
Fracture
Severe blunt force
As classified per orthopedics
—
Bruise dating is approximate and influenced by depth, location, age. Tissue bridges distinguish laceration (blunt) from incised wound (sharp).
Depth > length, may indicate weapon shape (single-edged vs double-edged); track direction important for medico-legal reconstruction
Chop wound
Heavy weapon with cutting edge (axe, machete)
Combines crushing + cutting; deep, irregular, often with underlying fracture
Defence wounds
Cuts on palms, ulnar borders of forearms, and dorsum of hands while warding off the assailant — strongly suggestive of homicide. Located on parts the victim raises in self-defence. Self-inflicted (suicidal) wounds are typically multiple parallel "hesitation" cuts on accessible non-vital areas (anterior wrist, anterior neck).
Exit wounds are typically larger, irregular, everted, and lack abrasion collar, scorching, or tattooing. Shored exit wounds (against a hard surface) can mimic entry and confuse investigators.
Asphyxial deaths
Hanging vs strangulation — the classic forensic comparison
Feature
Hanging
Ligature strangulation
Position of mark
High on neck, above thyroid cartilage
Below thyroid cartilage
Direction
Oblique, upward toward knot
Horizontal
Continuity
Non-continuous (gap at point of suspension)
Continuous around neck
Mark character
Pale, dry, parchment-like (compression by body weight)
Often red, with abrasions and ecchymoses
Petechiae
Less prominent
Prominent in face, conjunctivae, periorbital
Hyoid bone fracture
Less common (~10-30%)
More common, especially in manual strangulation
Manner of death
Mostly suicidal
Mostly homicidal
Manual strangulation (throttling) typically has fingertip-shaped contusions and crescentic abrasions from fingernails on the neck. Garrotting is ligature applied with twisting force.
Drowning
Wet drowning (~85%) — water aspirated; froth at mouth/nostrils, water in airway, washerwoman skin (pruning) of palms and soles, cutis anserina (goose flesh).
Dry drowning (~15%) — laryngospasm; little water in lungs.
Diatom test — diatoms recovered from femoral marrow indicates drowning (water reached circulation while heart was beating). Negative test does not exclude drowning.
Distinction — antemortem submersion has water in stomach and lungs; postmortem submersion typically does not.
Sexual assault medical examination
Governed by POCSO Act 2012 (children <18) and BNS 2023 / IEA 1872 (adults).
Examination principles
Examination by female doctor wherever feasible; in presence of female attendant; child-friendly approach for minors.
Informed consent in patient's language; for minors, guardian consent + child's assent.
Audio-video recording where possible.
Two-finger test is illegal and unscientific (Supreme Court ruling 2013, reiterated 2022). Hymen is not a reliable indicator of virginity.
Document general physical exam, mental state, clothing, evidence of struggle, genital and anal examination findings.
Forensic samples (within 96 hours optimal, up to 7 days for DNA)
Vaginal, oral, anal swabs and smears
Pubic hair combings and clippings
Fingernail scrapings/clippings
Blood for DNA, alcohol, drugs of abuse
Urine for drugs (especially in suspected drug-facilitated assault — benzodiazepines, GHB, ketamine)
Clothing in separate paper bags
Recent law changes — BNS 2023
The Bharatiya Nyaya Sanhita 2023 has replaced the Indian Penal Code 1860 (effective 1 July 2024). Relevant sections:
Rape (BNS Section 63) — corresponds to old IPC 375/376; broader definition; minimum 10 years to life imprisonment.
Gang rape (BNS Section 70) — minimum 20 years to life.
Rape causing death or vegetative state (BNS Section 66) — death or 20 years to life.
Rape of minor <12 — death or life imprisonment.
POCSO 2012 still applies for children <18 and provides additional protections.
Poisoning — Indian law and clinical priorities
The forensic doctor must distinguish accidental, suicidal, and homicidal poisoning, and preserve viscera for chemical analysis.
Common Indian poisons — organophosphates (commonest agricultural suicide agent), aluminium phosphide (Sulfas tablet, very high lethality), kerosene/paraffin (paediatric accidental), corrosive acids/alkalis, paracetamol, alcohol, datura, oleander, snake venoms.
Viscera preservation — stomach + contents, small intestine + contents, liver + kidney, blood, urine, vitreous humor — preserved in saturated saline (NOT formalin); organophosphate samples in plain container (no preservative).
Chain of custody — sealed container, signed labels, magistrate-witnessed dispatch to FSL.
Indian medico-legal framework — quick reference
Statute
Year
Scope
Bharatiya Nyaya Sanhita (BNS)
2023
Replaced IPC 1860 — substantive criminal law
Bharatiya Nagarik Suraksha Sanhita (BNSS)
2023
Replaced CrPC 1973 — criminal procedure
Bharatiya Sakshya Adhiniyam (BSA)
2023
Replaced IEA 1872 — law of evidence
MTP (Amendment) Act
2021
Termination up to 20 wk (one doctor); up to 24 wk (two doctors) for specified categories; beyond with Medical Board
Brain death certification; living and deceased donor framework
Consumer Protection Act
2019
Medical negligence under "deficiency in service"
Clinical Establishments Act
2010
Registration and standards for clinical establishments
Drugs and Cosmetics Act
1940
Schedule H, X for controlled drugs
NDPS Act
1985
Narcotics; criminal liability
Indian Medical Council (Professional Conduct, Etiquette and Ethics) Regulations
2002
Professional conduct (now under NMC 2019)
High-yield NEET PG MCQ traps
Tardieu spots — petechial haemorrhages under pleura/pericardium in asphyxial deaths.
Paltauf hemorrhages — subpleural patches in drowning.
Greenish discolouration of putrefaction starts at right iliac fossa.
Rule of nine for burns in adults; differs in children — head 18%, each leg 14%.
Patterned bruise preserves shape of weapon (rod, belt, hand).
Suicidal cut throat wound — multiple, parallel, on left side (in right-handed); hesitation marks; spares deep structures initially.
Homicidal cut throat — usually single, deep, transects vital structures, no hesitation cuts.
Brain death criteria (THOA 2011) — apnoea test, absent brainstem reflexes, two examinations 6 hr apart, board of four doctors.
Heat stroke vs hyperthermia — heat stroke is loss of thermoregulation with core temp >40°C and CNS dysfunction; in postmortem, fixed lividity is bright red (carbon-monoxide-like).
Fingerprints — Henry classification (loops, whorls, arches); never identical even in monozygotic twins.
Recent updates and Indian context
BNS / BNSS / BSA 2023 — replaced IPC 1860, CrPC 1973, IEA 1872. Effective 1 July 2024. Section numbering has changed; expect explicit naming in NEET PG questions.
MTP Act 2021 amendments — extended upper limit to 24 weeks for specified categories; recognised unmarried women's right to abortion.
Two-finger test — declared unconstitutional, professionally unethical; mention is a frequent NEET PG trap.
NMC Act 2019 — replaced Indian Medical Council Act; introduced National Exit Test (NExT).
Indian Medical Association directives — mandatory dual signatures on MLC reports; preserved hospital records minimum 3 years (10 years for medico-legal cases).
Frequently asked questions
What constitutes a medico-legal case (MLC)?
Any case where attending physician suspects need for legal investigation — assault, RTA, burns, poisoning, suspected suicide or homicide, sexual assault, dowry death, dog bite, custodial injury, drowning, electrocution, suspicious unattended death, brought-dead cases. The doctor is legally obligated to inform police and document findings without sharing the body until permitted.
What is the order of postmortem changes after death?
Pallor mortis (immediate, paleness from circulatory arrest), algor mortis (cooling at ~1°C/hour), rigor mortis (begins 2-3 hr, fully developed 12 hr, passes off 24-36 hr), livor mortis (1-2 hr, fixed by 6-8 hr), then putrefaction beginning at right iliac fossa with greenish discolouration after 24-48 hr in tropical climates.
How do you differentiate hanging from strangulation?
Hanging — ligature mark is high on neck above thyroid cartilage, oblique, non-continuous (gap at point of suspension), pale and parchment-like; minimal external trauma. Strangulation — mark is below thyroid, horizontal, continuous around neck, often with abrasions, contusions; petechiae prominent, signs of struggle present. Hyoid fracture more common in strangulation.
What does the POCSO Act 2012 mandate for child sexual abuse cases?
Protection of Children from Sexual Offences Act protects all children under 18. Mandates reporting by anyone with knowledge or suspicion (failure to report is punishable). Examination by female doctor in presence of guardian or female attendant, audio-video recording where possible, child-friendly procedures, in-camera trial within 1 year, no aggressive cross-examination. Two-finger test is illegal.
What are the legal requirements for medical termination of pregnancy in India?
MTP (Amendment) Act 2021 allows termination up to 20 weeks on opinion of one registered medical practitioner; up to 24 weeks on opinion of two practitioners for specific categories (rape, incest, minors, mentally ill, fetal abnormalities, change in marital status). Beyond 24 weeks only with Medical Board approval for substantial fetal abnormalities. Confidentiality is mandatory.
This content is for educational purposes for NEET PG exam preparation. It is not a substitute for professional medical advice, diagnosis, or treatment. Clinical information has been reviewed by qualified medical professionals.
Written by: NEETPGAI Editorial Team
Reviewed by: Pending SME Review
Last reviewed: April 2026
