LLM Group 5 Criminal Law and Criminal Administration Forensic Science and Scientific Investigation of Crime 2023 Question Paper with Solutions

For full marks, cover: the command word is "steps", so the answer must be a numbered process from the arrival of the exhibit to the examiner's appearance in the witness box, and an answer that describes what a questioned document examiner knows rather than what he does will not score. Eight steps is the right level of granularity. Attach the instrument to the step it belongs to, attach the statutory provision to the step it governs, and reserve the last five marks for the evidentiary weight of the resulting opinion, where the Supreme Court has said two different things in Magan Bihari Lal and Murari Lal and a third thing about the court doing its own comparison in Pali Ram.

This is not administrative fussiness. The document is the exhibit itself, and unlike a blood sample there is only ever one of it. New folds destroy the evidence of how it was folded, staple holes destroy the evidence of what it was attached to, and a chemical test applied too early destroys ink that the later tests need. The order of examination is therefore always non-destructive first, destructive last.

Step 2: preliminary examination

The examiner reads the document, establishes what precisely is in dispute, and records its physical condition: size, weight, colour and quality of the paper; watermarks; printing; folds; staple and pin holes; tears; stains; and whether the writing runs over or under any fold or crease. A photograph is taken of the whole and of each disputed part before anything else is done.

The legal power to demand requested standards is s.349 of the Bharatiya Nagarik Suraksha Sanhita, 2023, which allows a Magistrate of the first class to order any person, including an accused, to give specimen signatures or handwriting, ordinarily where he has at some time been arrested in the investigation, and by a further proviso even where he has not been arrested, for reasons to be recorded in writing. That compulsion does not offend Article 20(3), because State of Bombay v. Kathi Kalu Oghad, AIR 1961 SC 1808 held that furnishing a specimen is a mechanical act supplying material for comparison and not personal testimony.

Step 4: analysis of the questioned writing

The examiner analyses the questioned writing before looking at the standards, and the sequence matters because looking at the standards first invites the examiner to find in the questioned writing what he expects. He records the features under two heads.

Class characteristics are shared by groups of writers and derive from the copybook system the writer was taught, from national or regional writing style, and from the writing instrument. They can exclude but cannot identify.

The video spectral comparator illuminates the document with ultraviolet, visible and infrared light and records the response of the inks. Two inks that appear identical in white light frequently differ in their infrared luminescence or absorption, which reveals an addition or an alteration made with a different pen, and infrared examination frequently reads through an obliteration by ink that is transparent to infrared.

The electrostatic detection apparatus develops indented writing, the impression left in a sheet by writing on the sheet above it. This is a powerful and under-appreciated tool, because it can prove that a page was written while resting on a particular pad and therefore establish the sequence in which the pages of a document were prepared.

Thin layer chromatography separates the dyes in an ink and can show that two entries in a register were made with different inks. Ink dating by relative extraction of solvents is possible in principle within roughly the first two years of writing and is contested; it should be described with that qualification.

Ultraviolet examination reveals security features, chemical erasure and paper that has been treated or replaced.

Forgery is classified by the method, and the indications differ. A simple or spurious forgery makes no attempt to copy and shows the forger's own writing habits. A traced forgery, made through carbon paper, by indentation or against a light source, shows unnaturally slow and smooth line quality, tremor in places where a genuine writer accelerates, blunt starts and stops, pen lifts at the wrong points, and often the traced guideline itself. A simulated or freehand forgery, produced by practice, is the most difficult, and betrays itself by poor line quality, retouching and patching, and by the forger's own habits surfacing in the less conspicuous parts of the writing where his attention lapsed.

Step 7: evaluation and formulation of the opinion

The examiner evaluates the agreements and differences together and reaches one of a limited set of conclusions: identification, that the questioned and known writings were made by the same person; elimination; qualified opinions of probability in either direction; and inconclusive, where the material does not permit an opinion. An honest inconclusive is a legitimate result and a competent examiner returns them regularly, particularly where the questioned writing is short, as most disputed signatures are.

The weight of the opinion, where the marks are

The opinion is relevant under s.39(1) of the Sakshya Adhiniyam, which expressly extends to the identity of handwriting, and s.41 separately makes relevant the opinion of a person acquainted with another's handwriting.

The weight is the contested question. In Magan Bihari Lal v. State of Punjab, (1977) 2 SCC 210, a consignment of iron sheets was diverted by tampering with wagon labels and vehicle summaries, and the case against the appellant rested on a handwriting expert's opinion about the altered documents. The Supreme Court held that expert opinion must always be received with great caution, that it is unsafe to base a conviction solely on it without substantial corroboration, and that this had almost become a rule of law; it added that it would be extremely hazardous to condemn the appellant merely on the strength of the opinion evidence of a handwriting expert.

To these must be added State (Delhi Administration) v. Pali Ram, (1979) 2 SCC 158, which deals with the court doing the comparison itself. Section 72 of the Sakshya Adhiniyam, formerly s.73 of the Evidence Act, permits the Court to compare a disputed signature, writing or seal with one admitted or proved to be genuine. The Supreme Court held that although there is no legal bar to a judge using his own eyes, prudence and caution require him to hesitate before basing on his own comparison alone a finding about a handwriting which is the sheet anchor of the prosecution case; it is not advisable for a judge to take that task on himself, and the prudent course is to obtain the opinion and assistance of an expert. The Court also held that recourse to the section can be had only when an inquiry or trial is pending and the Court wants the writing for the purpose of enabling it to compare.

For full marks, cover: the question uses two technical words and they are not synonyms. Types are the three kinds of mark a scene yields, latent, patent and plastic, together with the method of developing each. Patterns are the ridge configurations, arches, loops and whorls, with their subdivisions and the delta and core that define them. Answer both, in that order, because that is the order in which the work is actually done: you find a mark before you classify it. Build the answer as the sequence a print travels, from the surface it was left on to the witness box, and put the criticism at the end, because a postgraduate examiner expects to be told that fingerprint comparison has no measured error rate.

The sequence a fingerprint travels

A print at a scene passes through seven stages before it convicts anybody: it is deposited, located, developed, recorded and lifted, searched against a collection, compared with a known print, and spoken to in evidence. Almost every reported Indian failure of fingerprint evidence has occurred at stage four or five and not at stage six, which is worth saying at the outset.

Stage 2 and 3: the three types, and how each is found

Latent prints are invisible and constitute the great majority of scene marks. They must be developed.

Patent prints are already visible, made when the finger is contaminated with blood, ink, grease, paint or dust and touches a clean surface. They are not developed at all; they are photographed, and where the contaminant is blood the print may also be enhanced with a protein stain such as amido black, which is a rare instance in which a print carries both identification and biological evidence.

Plastic or moulded prints are three-dimensional impressions in a soft receiving medium: putty, wax, soap, wet paint, adhesive tape, chocolate, butter, or the dust film on a neglected surface. They are recorded photographically with oblique lighting and may be cast in silicone.

Development of latent prints is chosen according to the substrate.

Stage 4: recording and lifting, which is where cases are lost

Every developed print is photographed in situ with a scale before any attempt to lift it, because lifting can fail and the photograph is then the only record. It is then lifted, ordinarily with transparent adhesive tape mounted on a backing card of contrasting colour, and the card is marked with the case, the exhibit, the exact location and the date, and is signed. Cyanoacrylate-developed prints are usually photographed rather than lifted.

The reason for the insistence on marking is entirely legal. A chance print is worthless unless the prosecution can prove where it came from, and it is at this stage that Mohd. Aman v. State of Rajasthan, (1997) 10 SCC 44 bites. The conviction there rested on a chance print developed on a brass jug recovered from the scene of a murder. The specimen prints of the accused had been taken three times over, because the Bureau kept returning them as unclear, and on none of those occasions were they taken before or under the order of a Magistrate as s.5 of the Identification of Prisoners Act then required. Worse, the jug itself had been in police custody at a time when the accused was also in police custody, so there was nothing to exclude the possibility that his print had been placed on it. The Supreme Court called it a glaring missing link and acquitted.

Whorls, about thirty to thirty-five per cent, have two or more deltas and at least one ridge making a complete circuit. The plain whorl has two deltas with a recurving ridge in front of each and an imaginary line between the deltas touching or crossing one recurving ridge. The central pocket loop whorl is a loop containing a small recurving pocket, in which that line fails to touch the inner recurve. The double loop whorl contains two distinct loop formations. The accidental whorl contains two or more different patterns or conforms to none of the definitions. Indian textbooks frequently group all whorls other than the plain whorl as composites.

Ridge counting subdivides loops: the number of ridges intervening between the delta and the core, counted along a line joining them and excluding both. Ridge tracing subdivides whorls: the left delta is traced along its lower ridge to a point opposite the right delta, and the number of intervening ridges makes the tracing inner, meeting or outer.

Stage 6: comparison, and the level at which it is made

Patterns exclude; they never identify. Identification is made on the minutiae, or Galton details: the ridge ending; the bifurcation; the dot or island; the lake or enclosure, where a ridge divides and rejoins; the spur or hook; the bridge; the crossover; and the trifurcation. Examiners speak of three levels of detail: level one, the overall pattern; level two, the minutiae and their relative positions, where identification is made; and level three, the pores, which is poroscopy, and the ridge edge shapes, which is edgeoscopy, used where the mark is very small.

The method is ACE-V: analysis of the questioned mark for suitability, comparison against the known print, evaluation to a conclusion of identification, exclusion or inconclusiveness, and verification by a second examiner.

All of this rests on State of Bombay v. Kathi Kalu Oghad, AIR 1961 SC 1808, in which an eleven-judge Bench held that "to be a witness" in Article 20(3) means furnishing evidence by personal testimony, and that giving an impression is a mechanical act supplying material for comparison which does not by itself incriminate.

The criticism

The premise of individuality is not seriously in doubt. What is in doubt is the comparison, and three objections should be given.

There is no established error rate. The examiner's conclusion is a judgment about whether the agreement is sufficient, not a measurement, and no numerical threshold has ever been scientifically justified. The older national conventions requiring eight, twelve or sixteen matching points were exactly that, conventions.

There is contextual bias. The examiner ordinarily knows which suspect the investigation favours, and the verifying examiner in ACE-V ordinarily knows what the first examiner concluded, so verification is not independent.

And chance prints are partial and distorted by pressure, by movement, by the curvature of the surface and by overlapping deposits, so the judgment is stretched precisely where the material is worst.

Classification narrows a search; identification is made at level two on the minutiae by ACE-V. In Indian law the opinion is relevant under s.39 of the Sakshya Adhiniyam, the Bureau Director's report is admissible under s.329(4)(c) of the Sanhita, and specimens are compellable under s.349 and the Criminal Procedure (Identification) Act, 2022 on the authority of Kathi Kalu Oghad. The discipline's soundness lies in individuality and its weakness in comparison, and Mohd. Aman shows that in India the case is usually lost earlier still, at the point where the exhibit and the specimen were handled.

The obvious solution, a supranational police force with power to operate across borders, is unacceptable to States because it would surrender sovereignty over criminal justice, which is among the last things any State will surrender. INTERPOL is the compromise that was actually available: an organisation with no police powers at all, which supplies the connective tissue between national forces that retain all of them.

Everything about it follows from that compromise. It has no power to investigate, no power to arrest, no territory, no jurisdiction and no means of compelling a member to do anything. No INTERPOL officer has ever arrested anyone. It provides a network, databases, notices, expertise and training, and every action taken on any of them is taken by a national police force under its own law.

The constitutional structure

INTERPOL, formally the International Criminal Police Organization, has 196 member countries and its headquarters at Lyon in France. It was founded at Vienna in 1923 as the International Criminal Police Commission, was compromised and effectively destroyed by its capture during the Second World War, was reconstituted in 1946, and adopted its present Constitution and name in 1956.

Two further organs matter. The Advisers provide expert advice in a purely consultative capacity. The Commission for the Control of Files is an independent body supervising the processing of personal data by the organisation, to which an individual may apply for access to, correction of, or deletion of, data held about him. It is the only remedy an individual has against INTERPOL itself.

The two articles that define the mandate

Article 2 of the Constitution defines the object: to ensure and promote the widest possible mutual assistance between criminal police authorities within the limits of the laws existing in the different countries and in the spirit of the Universal Declaration of Human Rights. The words "within the limits of the laws existing in the different countries" are the whole answer to any question about whether INTERPOL can override national law.

Article 3 defines the prohibition: it is strictly forbidden for the Organization to undertake any intervention or activities of a political, military, religious or racial character.

Three, operational police support. Specialised units address terrorism, organised and emerging crime, cybercrime, financial crime and corruption, fugitive investigation, trafficking in human beings and smuggling of migrants, environmental and wildlife crime, and illicit goods. The organisation deploys Incident Response Teams on request after a major crime or disaster, and its Disaster Victim Identification guide is the internationally accepted standard for mass fatality identification, resting on primary identifiers of fingerprints, dental records and DNA.

Four, police capability building and training. The least visible function and arguably the most durable, since it changes what national forces are able to do rather than what they are told on a particular day.

The notice system

Notices are international requests for cooperation or alerts, published by the General Secretariat at the request of a National Central Bureau or an authorised international entity. There are eight, seven of them colour coded.

A diffusion should be distinguished: it is a request circulated directly by one National Central Bureau to others rather than published by the General Secretariat, and it is subject to less prior scrutiny, which is why it has attracted the same criticism as the Red Notice with greater force.

The Indian position and the governing case

The Indian law on what a Red Notice actually achieves is settled by Bhavesh Jayanti Lakhani v. State of Maharashtra, (2009) 9 SCC 551. The appellant was alleged to have taken a child in breach of foreign custody orders, warrants had been issued abroad, and a Red Corner Notice had been published at the request of the foreign authorities. The Maharashtra police proceeded as though the notice authorised them to act against him.

The criticism

Article 3 is structurally difficult to enforce. The organisation assesses whether a request is predominantly political on the information the requesting State supplies, and a State intending to pursue a political opponent will present the matter as ordinary crime. Red Notices and diffusions have been used against dissidents, journalists and refugees. The reforms of the last decade, a strengthened task force reviewing requests before publication and a reformed Commission for the Control of Files with power to order deletion, have reduced the problem without removing it.

The consequences precede any adjudication. A person subject to a Red Notice may be detained at borders, refused visas and closed out of the banking system before any court anywhere has examined the merits, and his remedy lies to an internal Commission rather than to a court. That is a genuine rule of law objection and should be stated as such.

The system is only as strong as its weakest member. A database depends on what States choose to contribute, and cooperation on a given case is voluntary. Where a State declines to act, INTERPOL has no remedy at all, which is why extradition, and not the notice, remains the operative legal mechanism.

Abu Salem Abdul Kayyum Ansari v. State of Maharashtra, 2022 INSC 671 concerns the assurances on which a surrender is obtained. The appellant was extradited from Portugal in 2005 only after the Government of India gave the Portuguese authorities a solemn assurance that he would not be sentenced to death and would not be imprisoned beyond twenty-five years, Portuguese law forbidding surrender in the absence of such an assurance. On his conviction in India the Supreme Court held that the judiciary is bound to honour the sovereign assurance given by the executive, so the imprisonment could not exceed twenty-five years, and that the period of custody undergone in Portugal was to be set off.

Both decisions bear directly on the assessment of INTERPOL's role. The organisation's contribution to a transnational case is real, unsubstitutable and confined to a single step, which is telling 196 police forces at once where a wanted person is. Everything after that step, whether he may be arrested, whether he may be surrendered, what he may be tried for and how long he may be imprisoned, is determined by the municipal law of two States and by the terms they negotiate, and INTERPOL is a party to none of it. That is not a defect in the organisation; it is the design States chose, and the three decisions are the clearest available illustration of it in Indian law.

For full marks, cover: the stem names two stages, detecting and prosecuting, and it names a forum, the criminal judicial system. Organise the answer on those three: what ballistics does at the investigation stage, what it does at the trial stage, and what the courts have said about it. The Indian case law on this topic is unusually rich and unusually consistent, running from Mohinder Singh in 1950 through Sukhwant Singh in 1995 to Pritinder Singh @ Lovely in 2023, and all three say the same thing: where a firearm is used, the prosecution must bring the expert, and if it does not the case suffers. That line of authority is worth eight marks on its own and most candidates give none of it.

Class characteristics are common to every weapon of that make and model: the calibre, the number of lands and grooves, their widths, and the direction and rate of twist. These narrow a bullet to a class of weapon and can conclusively exclude a weapon of a different class.

Individual characteristics are the fine longitudinal striations produced by the microscopic imperfections left in that particular barrel by the tools that cut it and by subsequent wear and corrosion. These are the basis of any claim that a specific weapon fired a specific bullet.

The cartridge case carries a further set: the firing pin impression on the primer, the breech face marks impressed on the head of the case as it is driven back by the pressure, and the extractor and ejector marks made as the case is withdrawn and thrown clear. In a self-loading weapon the case therefore carries at least four independent sets of marks, and in practice cartridge case comparison is often more informative than bullet comparison, because the case is not deformed on impact.

The comparison is made on a comparison microscope, two microscopes joined by an optical bridge so that the test-fired specimen and the crime exhibit are viewed side by side at the same magnification under the same lighting, with the examiner rotating them until the striation patterns align across the dividing line.

It establishes the range, from the residue pattern on the target: a muzzle imprint and internal sooting at hard contact, blackening and singeing at close range, discrete powder tattooing at intermediate range, and neither at a distance. Range is estimated by test-firing the same weapon with the same ammunition at measured distances and comparing the patterns.

It may establish who fired, through gunshot residue. The primer of a modern cartridge contains lead styphnate, barium nitrate and antimony sulphide, and on discharge it produces characteristic spheroidal particles containing lead, barium and antimony together, which are collected from the hands, face and clothing on adhesive stubs and analysed by scanning electron microscopy with energy dispersive X-ray analysis. The finding of that specific three-element particle is significant; the older dermal nitrate or paraffin test, which detects nitrates generally, is discredited because nitrates are common in fertilisers, tobacco, cosmetics and urine, and it should be described as obsolete rather than as an alternative.

And it links scenes, because the same weapon used in different offences leaves the same striations, which is the basis of a national firearms exhibit collection.

And it supplies proof of the statutory offences. Under the Arms Act, 1959 the prosecution must establish that the article is a "firearm" and, for the aggravated offences, that it was in working order and capable of being fired, which is a matter for the examiner and not for the investigating officer. Section 25 punishes possession without licence, and s.27 punishes use of a prohibited arm or ammunition, with the gravest sub-section applying where such use results in death. Substantively the charge will ordinarily be under s.103(1) of the Bharatiya Nyaya Sanhita, 2023 for murder, or s.109 for attempt to murder.

The report reaches the court under s.329 of the Bharatiya Nagarik Suraksha Sanhita, 2023, the Director, Deputy Director or Assistant Director of a Central or State Forensic Science Laboratory being a Government scientific expert within sub-section (4)(e), and the opinion is relevant under s.39(1) of the Bharatiya Sakshya Adhiniyam, 2023. By the second proviso to s.330 the expert is not called unless a party disputes the report, which in a contested firearm case a competent defence always will.

What the Supreme Court has said, which is the heart of the question

Three decisions, spread over seventy-three years, say the same thing with increasing force.

Sukhwant Singh v. State of Punjab, (1995) 3 SCC 367, decided on 28 March 1995, is the case most often cited. An empty cartridge case had been recovered from the scene and a pistol with live cartridges had been seized from the appellant on his arrest, and the prosecution sent neither to the ballistic expert, so no comparison was ever made. The Supreme Court held that in cases where injuries are caused by firearms, the opinion of the ballistic expert is of considerable importance where both the firearm and the crime cartridge are recovered during the investigation to connect an accused with the crime, and that failure to produce the expert opinion before the trial court in such cases affects the creditworthiness of the prosecution case to a great extent.

Pritinder Singh @ Lovely v. State of Punjab, 2023 INSC 614, decided on 5 July 2023 by Gavai and Karol JJ, applied that proposition and acquitted. There was no evidence that the gun belonged to the accused, and the ballistic expert had not been examined to show that the wad and pellets recovered had been fired from the empty cartridges found. The Court described the failure to examine the ballistic expert as a glaring defect in the prosecution case, which, taken with serious doubts about the extra-judicial confession and the last-seen evidence, left the prosecution short of proof beyond reasonable doubt.

Most Indian firearm crime involves the worst material for the discipline. Smoothbore weapons, including the country-made single-shot weapons that account for a very large share of Indian firearm offences, impart no rifling marks whatever, so bullet comparison is impossible and the examiner is confined to the cartridge case where one exists at all. Improvised weapons also change between firings.

Gunshot residue is fragile and transferable. It is lost by washing, by wiping and by the passage of a few hours, and it transfers from a police vehicle, from handcuffs and from an officer who has himself fired a weapon, so a positive result on a person taken into custody hours after the event proves very little.

For full marks, cover: note carefully what this version of the stem does not say. It does not say "enlist" and it does not say "explain any three in detail". It says "explain the use", which invites a survey organised by what the devices are used for rather than a list followed by three expositions. The best structure is therefore the criminal process itself: devices used to prevent an offence, devices used at the scene, devices used in the laboratory, devices used to identify and trace a person, and devices whose subject is the police rather than the suspect. Cover a dozen or more devices, give each its use in a sentence or two, take four or five far enough to attach a statute or a case, and close on the constitutional cost.

Lighting, alarm and access control systems belong in the same category and are worth a sentence because they are cheap and effective and no statute is needed for them.

Radar and laser speed guns and red light violation detection systems prevent by enforcement, generating an automated penalty that changes driver behaviour at scale in a way that discretionary policing does not.

Devices used at the scene

The scene is where evidence is created and destroyed, and the devices used there have become legally compulsory rather than merely useful. Section 176(3) of the Bharatiya Nagarik Suraksha Sanhita, 2023 requires that, on information of an offence punishable with seven years or more, the officer in charge of the police station shall, from such date as the State Government notifies within five years, cause a forensic expert to visit the scene to collect forensic evidence and cause videography of the process. Section 105 requires the search and seizure process and the preparation of the list of seized articles to be recorded by audio-video electronic means, preferably a mobile phone, and forwarded to the Magistrate, and s.185 carries a similar requirement for a police search.

The gas chromatograph with mass spectrometer separates a mixture and identifies each component from its fragmentation pattern, and it is the confirmatory instrument for narcotics, poisons, accelerants in suspected arson, and explosive residues. Its output determines sentence as well as guilt in narcotics cases, and the law on how the quantity is measured changed when Hira Singh v. Union of India, (2020) 20 SCC 272 overruled E. Micheal Raj v. Intelligence Officer, NCB, (2008) 5 SCC 161 and held that the total weight of the mixture, including any neutral substance, determines whether the quantity is small or commercial.

The thermal cycler and the capillary genetic analyser perform DNA profiling, amplifying the short tandem repeat loci and separating the products by size. The comparison microscope performs firearm and tool-mark comparison. The video spectral comparator and the electrostatic detection apparatus perform questioned document work, separating inks that look identical and developing indented writing. The scanning electron microscope with energy dispersive X-ray analysis identifies gunshot residue particles containing lead, barium and antimony together.

Iris and retina scanners and facial recognition systems perform the same function on different biometrics. The legal basis for collecting all of them is the Criminal Procedure (Identification) Act, 2022, in force from 4 August 2022, which repealed the Identification of Prisoners Act, 1920 and whose s.2(1)(b) defines "measurements" to include finger, palm and foot impressions, photographs, iris and retina scan, physical and biological samples and their analysis, and behavioural attributes including signatures and handwriting.

In Paramvir Singh Saini v. Baljit Singh, (2021) 1 SCC 184, decided on 2 December 2020, the Supreme Court, dealing with custodial violence, directed that closed circuit television cameras with night vision and both audio and video be installed in every police station at all entry and exit points, the lock-up, corridors, lobbies, reception areas, verandas, the Inspector's room, the station hall and the compound; that the footage be preserved for eighteen months and in no case less than a year; that any malfunction be reported by the station house officer for immediate repair; and that the same be done in the offices of central agencies which interrogate and hold accused persons. It grounded the whole scheme in Article 21.

The body-worn camera is the mobile counterpart, covering the officer when he leaves the station, and it is the device that in practice discharges the videography duties in ss.105, 176(3) and 185 of the Sanhita.

The retention rule is the sharpest example. Under s.4(2) of the Criminal Procedure (Identification) Act, 2022, records of measurements are kept for seventy-five years from collection, with destruction available only to a person not previously convicted who is released without trial, discharged or acquitted after exhausting all legal remedies, and even then subject to the court directing otherwise. Measured against K.S. Puttaswamy v. Union of India, (2017) 10 SCC 1, which requires legality, a legitimate State aim and proportionality for any invasion of privacy, seventy-five years of biometric retention from a person never charged is difficult to justify on the proportionality limb, and the question has not been authoritatively answered.

Nor does data protection law supply a check. The Digital Personal Data Protection Act, 2023 exempts, by s.17(1)(c), processing in the interest of the prevention, detection, investigation or prosecution of any offence, and by s.17(2)(a) processing by such instrumentality of the State as the Central Government may notify on grounds of sovereignty, security of the State and public order.

For full marks, cover: this is the only question in the folder that prints its own split, and the split tells you the setter's weighting: twelve for forensic biology and thirteen for narco-analysis. Both must be answered; there is no choice in Q6. Give forensic biology as a working discipline, with the tests named and the sequence in which they are run, and give narco-analysis as a legal problem, because after Selvi the science of it is worth almost nothing and the law of it is worth almost everything. Divide your time thirteen to twelve, not twenty to five.

a) Forensic biology (12 marks)

What the discipline is. Forensic biology examines material of biological origin, human, animal or plant, in order to answer a question in a legal proceeding. It works on blood, semen, saliva, sweat, urine, faeces, vomit, hair, bone, teeth and tissue, and on the botanical and microbial side on diatoms, pollen, spores, wood and plant fragments and on insects.

Species. The precipitin test uses antiserum raised in an animal against human protein; a precipitate at the interface with an extract of the stain indicates human origin. It is now performed as gel diffusion or crossover electrophoresis, and it is the test that eliminates the frequent Indian defence that the blood was that of a goat or a chicken.

Semen. The presumptive test is for acid phosphatase, present in seminal fluid at far higher concentration than elsewhere. Confirmation is by microscopic identification of spermatozoa, which is conclusive, and by the Florence test for choline and the Barberio test for spermine. Prostate specific antigen is the immunological confirmation that matters most in practice, because it is detectable in the seminal fluid of a vasectomised or azoospermic man, in whom no spermatozoa will be found and in whose case the microscopic test would wrongly report a negative.

Saliva is identified by amylase, and matters because it is deposited on cigarette ends, bite marks, envelope flaps, bottle rims and cloth used as a gag, all of which are excellent sources of DNA. Hair is examined microscopically for whether it is human or animal, the region of the body, whether it was shed or pulled, and whether the root sheath is present, which determines whether nuclear DNA can be obtained or only mitochondrial.

The weakness. It is not the chemistry. In Rahul v. State of Delhi (NCT of Delhi), 2022 LiveLaw (SC) 926, the biological samples in the Chhawla case lay in police custody for about two months with no record of their preservation, and the Supreme Court declined to act on the reports and acquitted three men under sentence of death. In Kattavellai @ Devakar v. State of Tamil Nadu, 2025 INSC 845, decided on 15 July 2025, samples taken on 19 May 2011 reached the laboratory on 29 June 2011, a forty-one day gap the prosecution could not explain, and the Court acquitted a man under sentence of death and issued nationwide directions requiring documented packaging, transmission to the laboratory within forty-eight hours with written reasons for any delay, and a Chain of Custody Register signed by every handler and forming part of the trial record.

And there is no validation: no published error rate, no controlled study of the ratio of true to false statements, no accepted method of scoring, so the technique fails the reliability requirement laid down for expert evidence generally in Ramesh Chandra Agrawal v. Regency Hospital Ltd., (2009) 9 SCC 709 before any constitutional question arises. The consequence usually missed is that the technique cannot reliably exonerate either, since a subject capable of confabulating an admission can confabulate a denial.

The Indian law before 2010. The technique was permitted, and in this State the leading decision was Ramchandra Ram Reddy v. State of Maharashtra, decided by the Bombay High Court on 5 March 2004, upholding orders of the Special Court at Pune permitting brain mapping, polygraph and narco-analysis of the accused in the counterfeit stamp paper investigation in which Abdul Karim Telgi was the principal accused. The High Court reasoned that Article 20(3) protects against compulsory testimony and that the P-300 and polygraph tests extract none, and it treated the challenge to narco-analysis as premature because whether a statement was incriminating could be judged only after the test was administered.

The safeguards. Selvi directed strict compliance with the National Human Rights Commission's Guidelines for the Administration of Polygraph Test (Lie Detector Test) on an Accused, 2000, extended to narco-analysis and the brain electrical activation profile. They require that the accused be given the option rather than required to take the test; that he be informed of its legal, physical and emotional implications with access to a lawyer; that his consent be recorded before a Judicial Magistrate, with the lawyer permitted to explain the implications and the accused told that the statement will have the status of a statement to the police and not a confession before a Magistrate; that the Magistrate consider the length and nature of the detention; that the test be conducted in an independent agency such as a hospital in the presence of a lawyer; and that a full medical and factual narration be recorded, including the physical, emotional and legal condition of the subject.

Conclusion. Forensic biology answers, in order, whether material is biological, what it is, what species it came from and whose it is, using a graded sequence of presumptive, confirmatory, species and grouping tests before DNA takes over, and its modern failures in Rahul and Kattavellai were failures of custody rather than of analysis. Narco-analysis is interrogation under a barbiturate infusion, moderately effective at producing speech and wholly unreliable as a source of truth because suggestibility and confabulation are properties of the state it induces. After Selvi it cannot be compelled, its results are inadmissible even with consent, and only a subsequent discovery survives under the proviso to s.23(2) of the Sakshya Adhiniyam, subject to the National Human Rights Commission's 2000 safeguards; Amlesh Kumar in June 2025 confirms this and adds that no accused may demand the test and that its findings can never be the sole basis of conviction.

Recovery. The anthropologist locates and excavates buried or scattered remains by archaeological method, recording the position of every element in three dimensions along with the soil stratigraphy and any associated objects. This is not fastidiousness: the spatial record establishes whether a grave was dug and how, whether the body was moved after death, whether the remains represent one individual or several, and roughly how long they lay there. A body dug out with spades by a police party has lost that information permanently, which is one of the practical reasons for s.176(3) of the Bharatiya Nagarik Suraksha Sanhita, 2023, requiring a forensic expert to attend the scene of an offence punishable with seven years or more.

Preliminary assessment. Before anything else the anthropologist establishes that the material is bone; that it is human and not animal, which is a common and embarrassing error in unskilled hands; how many individuals are represented, by counting duplicated elements; and whether the remains are of forensic or archaeological antiquity, which determines whether there is a case at all.

Ancestry is assessed from craniofacial morphology and is the least reliable of the four, both because human variation is continuous rather than categorical and because the reference series on which the methods were built are old and geographically narrow.

Individuation. The profile narrows the field to a class of persons; identification requires comparison with ante-mortem records: dental charts and restorations, which are highly individual; healed fractures; surgical implants, which often carry serial numbers; and frontal sinus radiographs, whose pattern is individual. DNA may be recovered from the dense cortical bone of the femur or from tooth pulp. Where no records exist, the anthropologist may attempt facial approximation or craniofacial superimposition, which overlays the skull on an ante-mortem photograph and tests the correspondence of anatomical landmarks.

Its Indian standing was settled in Pattu Rajan v. State of Tamil Nadu, (2019) 4 SCC 771, where the identification of a recovered body had been challenged for want of a DNA test: the Supreme Court accepted the superimposition result as part of a body of evidence corroborated by other reliable testimony, while stating that the technique is not infallible and observing that DNA evidence too is opinion evidence by which the court is not bound.

The Indian legal use. The commonest is age determination, and it is regulated rather than free. Section 94 of the Juvenile Justice (Care and Protection of Children) Act, 2015 places the ossification test last, permitting it only in the absence of the matriculation or school certificate and of a birth certificate from a corporation, municipal authority or panchayat. In Jarnail Singh v. State of Haryana, (2013) 7 SCC 263, the Supreme Court held that this procedure applies also to determining the age of a child who is the victim of an offence, which is how it reaches prosecutions under the Protection of Children from Sexual Offences Act, 2012. The estimate is least reliable in precisely the band around eighteen years where it is most often needed, and an honest report says so.

Disaster victim identification applies the same methods at scale, following the INTERPOL standards, which rest on the primary identifiers of fingerprints, dental records and DNA, with anthropological findings used to sort and reassociate commingled remains.

The sequence from autopsy to opinion, which is where the marks are. Section 194(3) of the Bharatiya Nagarik Suraksha Sanhita, 2023 requires the body to be forwarded for post-mortem examination where there is any doubt about the cause of death, and in a suspected poisoning the autopsy surgeon collects the viscera: the stomach with its contents, a length of small intestine with contents, a portion of liver, one kidney, and separately blood and urine. The preservative is saturated saline, and the classic examination point is that rectified spirit must not be used where alcohol is in question, because it would destroy the very analysis required. Each container is separately sealed, labelled and despatched with a specimen of the seal.

Analysis then proceeds in two stages, the same structure as serology and for the same reason: a broad screen by immunoassay or thin layer chromatography, which is sensitive but not specific, followed by confirmation and quantification by gas chromatography with mass spectrometry or liquid chromatography with tandem mass spectrometry.

Section 185 of the Motor Vehicles Act, 1988 fixes the drink-driving threshold at thirty milligrams per hundred millilitres of blood, detected by a breath analyser or any other test including a laboratory test. And under the Narcotic Drugs and Psychotropic Substances Act, 1985, punishment is graded by quantity, on which Hira Singh v. Union of India, (2020) 20 SCC 272, decided on 22 April 2020, overruled E. Micheal Raj v. Intelligence Officer, NCB, (2008) 5 SCC 161 and held that the whole weight of the mixture, including any neutral substance, and not the pure drug content, determines whether the quantity is small or commercial.

Conclusion. Forensic anthropology answers the identity of the unknown dead through recovery by archaeological method, assessment of the material, the four determinations of sex, age, stature and ancestry, and individuation against ante-mortem records or, failing those, by superimposition, which Pattu Rajan accepts as corroborative and not infallible; its most regulated Indian use is age determination, where s.94 of the Juvenile Justice Act puts the ossification test last and Jarnail Singh extends the procedure to victims.