Forensic Medicine and Medico-Legal Investigation: Inquest Types

Forensic medicine is a clinical specialty taught alongside pathology in Indian medical colleges. The textbook scope runs across five main blocks: thanatology (the science of death, covered in the next topic), traumatology (injuries, blunt and sharp and firearm), toxicology (the medical side, sample collection and clinical effects), forensic identification (age, sex, stature, dental, anthropometric) and sexual medicine including the medico-legal examination of rape survivors. The doctor's working title in a state medical college is usually Professor of Forensic Medicine and Toxicology; the same person is the medical officer who arrives at the mortuary to perform the post-mortem.

The relationship between forensic medicine and forensic science is one of overlap, not identity. Both are forensic in the sense of supporting the criminal justice system, but they answer different questions with different methods.

The medico-legal expert and the criminalist sit on the same expert witness statute (Section 39 BSA, the renumbered successor to Section 45 IEA) but the work product they bring to court is different. The doctor's opinion on cause of death is almost always read by the trial judge in full; the FSL report tends to be read for the opinion paragraph only.

This page focuses on the medico-legal investigation pipeline rather than the medicine itself. The medicine (modes of death, post-mortem changes, time since death) is the subject of the next topic on thanatology.

A medico-legal investigation, in Indian practice, is the post-FIR sequence of body examination, autopsy, sample collection, FSL analysis and expert opinion that culminates in the cause-of-death certification. The IO commissions the work; the doctor signs it. Four objectives drive every stage.

1. Establish the cause of death
   The proximate disease or injury that ended life. Asphyxia due to ligature strangulation. Haemorrhagic shock due to penetrating injury of aorta. Acute aluminium phosphide poisoning. The opinion paragraph on the post-mortem report carries this.
2. Determine the manner of death
   Natural, accidental, suicidal, homicidal, or undetermined. The classification has direct legal effect: a homicidal manner triggers BNS sections; a suicidal manner closes the FIR after Section 196 inquest.
3. Identify the deceased
   Especially in unidentified bodies, decomposed bodies and mass disasters. Visual ID, dental, fingerprint, anthropometric measurements, DNA. The IO cannot proceed without identification confirmed under the relevant Indian protocol.
4. Estimate the time since death
   Window during which death is likely to have occurred. Based on algor, rigor, livor, putrefaction, gastric contents, entomology. Covered in detail in the thanatology topic.

A fifth objective, sometimes listed separately and sometimes folded into the first, is to document antemortem injuries and distinguish them from post-mortem artefacts. The distinction is forensic, not cosmetic: only antemortem injuries are admissible as evidence of assault. Vital reactions (haemorrhage into tissues, inflammatory response, scab formation) are the medico-legal markers a doctor uses to call an injury antemortem. Post-mortem injuries inflicted during body movement, attempted disposal or animal predation are noted but do not feed the charge sheet.

The Mahabir Mandal v State of Bihar line of authority is the standard citation that the inquest and the post-mortem must be conducted promptly and that delay without recorded reasons is a defence pressure point. Indian appellate courts have read promptness into the BNSS Section 196 framework even where the section itself sets no clock.

An inquest is a structured enquiry into an unnatural, suspicious, sudden or otherwise non-natural death. The point of the inquest is not to convict anyone. The point is to record what is observable at the scene and on the body, list the persons present, take witness statements and decide whether the death needs to be processed as a criminal case. The output of an inquest is a report, not a verdict.

Indian textbooks consistently list four types of inquest. Only two are active in Indian practice in 2026.

The headline distinction between the four is who runs the enquiry. The police inquest is run by a police officer. The magistrate's inquest is run by an Executive Magistrate. The coroner's inquest, in its heyday, was run by a Coroner who was a judicial officer with a small permanent court and jury powers (the Bombay Coroner's Court at JJ Hospital is the standard textbook example). The medical examiner system places a forensic pathologist in the seat that the coroner used to hold and is the US default in states like New York and California.

The police inquest is the default channel. Every suicide, every road traffic fatality, every fall from height, every accidental electrocution, every death in a hostel room with no witnesses runs through it. The statutory basis is BNSS Section 196 (the renumbered successor to CrPC Section 174), and the procedure is largely continuous with the pre-BNSS practice, with the videography overlay from Section 105 now added.

The procedure, in working order:

• Information received. The SHO learns of an unnatural death (a hospital intimation, a Dial 112 call, a public report). The information is recorded in the station diary and an FIR or General Diary entry is made depending on the apparent manner.
• Visit to the place. The IO, with two or more respectable inhabitants of the locality (panch witnesses) and a constable, proceeds to the place where the body lies. The visit is itself an inquest event under Section 196.
• Examination of the body in situ. The IO examines the body for visible injuries, position, clothing, blood patterns, environmental factors. The examination is documented in the inquest report (Form 25-35 of the relevant state police rules, varies by state).
• Examination of witnesses. Statements of persons who saw the deceased before death, or who first saw the body, are recorded under Section 180 BNSS (the renumbered successor to CrPC 161). Witness statements are signed by the IO, not by the witness.
• Requisition for post-mortem. If the cause of death is not clear, or if there is suspicion, the IO sends the body to the nearest authorised mortuary with a written requisition for a medico-legal post-mortem. The requisition is the trigger for the doctor's work.
• Inquest report submitted to magistrate. The IO submits the inquest report along with the post-mortem report to the District Magistrate or the Sub-Divisional Magistrate having jurisdiction.

The forensic implications are visible at every step. The Section 105 videography overlay applies to the body examination in the same way it applies to any search and seizure. The Section 176(3) FSL-at-scene rule (covered in Bharatiya Nagarik Suraksha Sanhita (Investigation)) is triggered when the offence punishable is 7+ years, which catches most homicide-suspect inquests on day one. The chain of custody for the body itself, and for samples taken at autopsy, runs through the standard CoC channel covered in Chain of Custody.

The magistrate's inquest is the channel reserved for deaths where letting the police clear the case alone would be a conflict of interest or a public-confidence problem. The statutory basis is BNSS Section 198 (was CrPC Section 176). The Section is read with the Supreme Court's directions in D K Basu v State of West Bengal (1997) and the NHRC's 1993 guidelines on custodial death, both of which add procedural detail that the bare statute does not spell out.

The categories that require a magistrate's inquest under Section 198 and the surrounding regime:

• Death in police custody. Whether the deceased was an arrested person, a person being questioned, or a person in lock-up. The category catches deaths in transit too.
• Death in jail or other state institution. Includes prison, juvenile home, beggar's home, mental health establishment under the Mental Healthcare Act 2017.
• Dowry death within seven years of marriage. The category, originating in Section 174(3) CrPC, is now in BNSS and is read with Section 80 BNS (the renumbered successor to Section 304B IPC). The seven-year window is calculated from the date of marriage to the date of death.
• Death of a rape victim. Whether immediately after the assault or subsequently from injuries or sequelae.
• Custodial rape resulting in death. Read alongside the special provisions for medical examination under BNSS Section 53A.

1. Trigger event
   An institution reports a death that falls in any Section 198 category. The duty officer at the station receives the report and informs the Executive Magistrate having jurisdiction (the SDM or Tahsildar), as well as the NHRC where custodial.
2. Magistrate arrives
   The Executive Magistrate visits the place of death, ideally within 24 hours. NHRC guidelines treat any delay beyond 24 hours as a procedural lapse that must be explained in the inquest report.
3. Independent examination
   The Magistrate examines the body and the place. The examination is independent of the police inquest, and the Magistrate may take additional witness statements. Section 198 inquests are not delegated back to the police.
4. Post-mortem by two doctors
   For custodial deaths the NHRC guidelines require a panel post-mortem by two doctors, with full videography, and a copy of the report sent directly to the NHRC. The body is not handed over to relatives until this is done.
5. Inquest report submitted
   The Magistrate's inquest report goes to the District Magistrate and, for custodial deaths, to the NHRC. The report is open to scrutiny in any subsequent writ petition and in criminal proceedings against custodial officers.

The mandatory nature of the magistrate's inquest in the Section 198 categories is the controlling rule: there is no scenario in which a police inquest substitutes for a magistrate's inquest in a custodial death. The Supreme Court has been unambiguous on this since D K Basu, and the BNSS preserves the position.

A sudden death, in medico-legal terms, is a death that occurs within 24 hours of the onset of symptoms in a person not previously known to be in a life-threatening state. The 24-hour rule comes from the WHO classification and is the working definition Indian forensic medicine textbooks use. Sudden deaths can be natural (acute myocardial infarction, pulmonary embolism, ruptured aortic aneurysm, intracerebral haemorrhage) or unnatural (poisoning that mimics a natural cause, occult trauma, suffocation by a smaller person). The medico-legal default is to treat every sudden death as suspicious until natural cause is established at autopsy.

A suspicious death is a death where the circumstances raise a reasonable doubt about whether the cause is natural or whether foul play is involved. The standard textbook examples are:

• Drowning without witnesses, particularly in a domestic well or a tank.
• Hanging in privacy, where the only person who could corroborate suicidal intent is the deceased.
• Accidental fall in custody, which automatically attracts Section 198 and the NHRC protocol.
• Sudden death of a young person with no known pre-existing disease, especially within hours of an argument or a stressful event.
• Death at home with a recent insurance event, where motive concerns require ruling out staged accidents.

The end-to-end workflow that ties this page together:

The defence attack lines on this workflow are reasonably stable. Late dispatch of the body to the mortuary, gaps in the seal between mortuary entry and autopsy, missing samples at FSL receipt, and inconsistencies between the inquest report and the post-mortem report on the position of the body are all standard cross-examination openings. An inquest report that records actual scene observations is the foundation on which the rest of the medico-legal case rests; a generic or delayed report is a standard defence pressure point.