[Vol 4/ Issue 2/ March 2019] [ISSN 2394-9295]

Ms. Bhavya Sharma

B.B.A., LL.B(H)

Student, Amity Law School, Noida (U.P)

Email ID:


Narco – investigation has been the most discussed subject among the lawful brotherhood, media and normal masses. With ongoing approach of advances in each circle of life, criminal examination is not any more let well enough alone for its belongings. Narco – examination is one of such logical types of examination in which some kind of proclamation from the blamed is obtained which may frame a proof. The Evidence Act is totally quiet on such work of logical process. Such process has frequently been scrutinized as against the principles of Constitution and then again has been maintained as a need to assess some entangled issues. This article is gone for investigating the evidentiary estimation of narco – examination.

Keywords-: Narco–analysis, Examination, DNA, Investigation, Proof.



Amid criminal preliminaries, proof principles confine both the substance of proof displayed and the way that proof can be introduced amid a preliminary. Proof principles not just guarantee the smooth running of a criminal preliminary, yet additionally, secure a litigant’s entitlement to a reasonable preliminary. Logical proof, or criminological proof, is data inferred through the “logical technique”. Normally, logical proof, for example, DNA, fingerprints, ballistics, and different things, is frequently entered amid a criminal preliminary by the two sides. As opposed to a few convictions, polygraph proof isn’t normally considered sufficiently dependable to be admitted to a criminal preliminary, nor is most explanations made under mesmerizing or different types of adjusted cognizance.

Normally, swinging to the chain of authority tenets may instantly put into inquiry the legitimacy of a conceded bit of proof. This bit of proof may have experienced logical testing that restored a given outcome, which can be ruled forbidden if the chain of proof was not appropriately pursued. Furthermore, arguments about conceding proof are ordinarily heard amid a minitrial, which enables the jury to leave, while a choice to concede or stifle a given bit of proof is built up. This minitrial occasion keeps members of the jury from being impacted by proof, which might be forbidden.

Logical confirmations are critical to the reality discoverer with a specific end goal to touch base at the legitimate result in choosing huge number of issues brought before him/her. In the present time, they have nearly turned out to be essential to them. Regardless of whether logical proof merits accepting or not is a key issue which can be experienced by a judge/jury at whatever point logical proof is put before him.

Till as of late, the courts needed to depend on the non-logical confirmations simply because of the non – accessibility of appropriate innovation. Be that as it may, the issues related with such confirmations are -:

The observer watches the event for a brief period. He may intermix the demonstrations of different people in the event. He might be one – sided for the person in question or the guilty party and might be rationally imbalanced prompting embellishment of the occasion. The onlooker may overlook, justify or get befuddled as his announcement is recorded after an impressive pass of time and be unnerved by the court condition.

He might be over – awed by the restricting direction and also may intuitively consider the supposition of others with whom he has talked about the happenings of the case or who have broadcast their assessment in the media. He might be dubious about the personalities of the guilty parties and may not watch the entire event. His forces of perception, memory and depiction have a critical impact[ii].


The term Narco Analysis is gotten from the Greek word ‘narke’ (signifying ‘anesthesia’ or ‘torpor’) and is utilized to depict a demonstrative and psychotherapeutic procedure that utilizations psychotropic medications[iii]. The term Narco Analysis was first utilized by Horseley. In 1922, the Narco – analysis test entered the standard when Robert House, a Texas obstetrician, utilized the medication scopolamine on two detainees[iv].

[v]The Narco Analysis test is a sort of a mental test. A medication named sodium pentothal is given with moderate IV (An IV implantation is a controlled organization of prescription into your circulation system after some time) and the phase of the patient is checked over the time of the test. The measurement is subject to the individual’s sex, age, wellbeing and physical condition. A wrong measurement can result in a man going into a state of insensibility, or even passing. The patient builds up a dissociative state amid the test. The first identity of the patient separates the relationship with his awareness.

In this test, the hindrance of patient blurs, in light of the fact that, in a phase of cognizance, he can stifle what he doesn’t wish to discharge, however in the dissociative express, the patient easily communicates reality or smothered data of his sub – cognizant personality. In the event that the patient needs to keep truth in the phase of restraint while being cognizant is then that the narco investigation test is finished. The narcosis condition of the mind is delivered with the assistance of this test and thus, the extraction of the fact of the matter is anticipated. It is a sort of a dissociative test. The revelations made during this stage are recorded both in video and audio cassettes


A steady observing of circulatory strain, heartbeat, or ECG (the example of cardiograph) of the patient or blamed is done as part for the test in the wake of infusing sodium pentothal which is directed intravenously alongside dextrose over a time of three hours with the assistance of anesthetist. The response in the patient begins close to solution. The utilization of sodium pentothal once in a while steadies the patient and puts them to rest. Be that as it may, it is obligatory to keep up the level of cognizance and keep the patient in a languid state. The subject isn’t in a situation to talk up alone however can answer particular yet basic inquiries. The appropriate responses are accepted to be unconstrained as a semi – cognizant individual can’t control the appropriate responses.

At the point when the mind perceives a man or a sound, it produces a specific kind of electric wave, which is known as a P300. Sensors are connected to the leader of a man experiencing a P300 test and the subject is situated before a PC screen. He is then demonstrated certain pictures or made to hear certain sounds. The sensors screen electrical action in the cerebrum and enlist P300 waves, which are created just if the subject has some association with the improvement, for this situation pictures or sounds.


Narco examination isn’t transparently allowed for investigative purposes in most created and additionally majority rule nations. In India, the narco investigation test is finished by a group including an anesthesiologist, a specialist, a clinical/criminological analyst, a sound – videographer, and supporting nursing staff. The measurable analyst will set up the report about the disclosures, which will be joined by a reduced plate of sound – video chronicles. The quality of the disclosures, if fundamental, is additionally checked by subjecting the individual to polygraph and cerebrum mapping tests.

[vi]Narcoanalysis is not considered very reliable. Studies done by various medical associations in the US adhere to the view that truth serums do not induce truthful statements and subjects in such a condition of trance under the truth serum may give false or misleading answers. In USA, in the case of Townsend v. Sain[vii] it was held that the petitioner’s confession was constitutionally inadmissible if it was adduced by the police questioning, during a period when the petitioner’s will was overborne by a drug having the property of a truth serum.

[viii]It has been affirmed that Narco Analysis is an outright infringement of the Article 20 (3) of the Indian Constitution. Notwithstanding, in this period of regularly expanding wrongdoing rate, such tests frequently render a great deal of assistance to the examination organizations and henceforth, the opportunity has already come and gone to mix Article 20 (3) with the Narco Analysis.

It additionally conflicts with the adage Nemo Tenetur se Ipsum Accusare that is, ‘No man, not in any case the charged himself can be constrained to answer any question, which may have a tendency to demonstrate him liable of a wrongdoing, he has been blamed for’. On the off chance that the admission from the denounced is gotten from any physical or good impulse (be it under entrancing perspective) it should remain to be dismissed by the court. The fundamental issue along these lines is the subject of its tolerability as a logical strategy in examinations and its definitive acceptability in court as criminological proof.


In the Narco Analysis Test, the subject goes into a “nightfall” organize i.e. a phase among awareness and obviousness. In this state, it ends up troublesome for him to lie and his answers would be confined to actualities he is as of now mindful of. Preceding the test, Court’s authorization and composed assent of subject is anchored which are obligatory for directing the test. The methodology is disclosed to the subjects. The test is directed just within the sight of legal and therapeutic specialists[ix].

[x]The Nithari Killings case appears to have been fathomed and the liable conveyed to book – “because of reality serum,” Truth Serum is utilized to extricate reality yet what is in this way ‘separated’ may not, really, be reality. The principal question, thusly, isn’t if narco-investigation can uncover reality however whether it is legitimately passable or not. Also, truth serum is obviously not naturally ‘clean’, as it were, on the grounds that it works by devastating the volition of the blamed and relaxing his minds up. This, at the end of the day, implies taking without end one’s command over one’s psyche, and making him talk all the more uninhibitedly. However, the legal conclusion has an alternate interpretation of it.

In Dinesh Dalmia v. State[xi] (2006) the Madras High Court decided that narco-examination declaration was not ‘declaration by impulse’ in light of the fact that the charged “might be taken to the research center for such tests without wanting to, yet the disclosure amid such tests is very willful.” Now, the most significant terms to be dissected are here are ‘impulse’ and’ voluntary’

Here they are treated as totally unrelated as in if the declaration is by ‘impulse’ it can’t be ‘deliberate’ while it is especially conceivable to ‘propel’ one to affirm ‘intentionally’. What’s more, that would surely be a declaration by impulse in spite of the component of volition characteristic in it. One can be beaten, tormented or debilitated into affirming or admitting in the court. Would that declaration or admission be intentional? In the event that this isn’t intentional, how could a declaration affected by medications, when even one’s volition is suspended, be ‘voluntary’ by any stretch of the creative energy? The choice of the High Court plainly expresses that the individual being referred to is taken to the research facility “without wanting to”, and this is the place the impulse begins. In the research facility, he is infused with medications that make him slip into a daze like condition with his restraints down and after that the inquiries are asked, and he answers since he never again has any authority over his cerebrum. What’s more, he begins looking at everything that is at the forefront of his thoughts – good and bad, genuine and nonexistent.

Bombay High Court held in the Abdul Karim Telgi case that “specific physical tests including negligible substantial damage” like narco – investigation and did not abuse Article 20 (3) and did not bargain the sacred insurance against self – implication. The redeeming quality is that the admission or the announcement made amid narco – examination isn’t permissible as proof in a courtroom, and that is simply the motivation behind why the assurance – implication under Article 20 (3) isn’t broken. The exposure prompting the recuperation of implicating material, similar to a homicide weapon or produced archives, is acceptable. In the above – specified case, Bombay High Court appears to have held that narcoanalysis is allowable on the grounds that it includes “negligible substantial damage”, which suggests that every single such strategy for separating data that dispenses insignificant real mischief are lawfully admissible[xii].

Case Analysis -: Aarushi Talwar – Hemraj Double Murder Case

[xiii]The assemblage of Aarushi Talwar was found in her room in house No. L – 32, Jalvayu Vihar, Sector 25, Noida, the evening of 15 – 16.5.2008. In the primary data report Dr. Rajesh Talwar, her dad pointed the needle of doubt at Hemraj, a residential help in the family of the Talwars. On 17.5.2008 the dead group of Hemraj was recuperated from the porch of a similar house, i.e., house No. L – 32, Jalvayu Vihar, Sector 25, Noida, where Aarushi’s homicide had additionally supposedly been submitted. Direct Investigations led by the police uncovered the accompanying focuses. No blood of Hemraj was found on the bed sheet and pad of Aarushi[xiv]. There is no proof to demonstrate that Hemraj was executed in the room of Aarushi.

Hauling mark on steps just show that homicide has occurred some place other than the porch. On the garments of Dr. Rajesh Talwar, just the blood of Aarushi was found yet there was no hint of blood of Hemraj. The garments that Dr. Nupur Talwar was wearing in the photo taken by Aarushi in the evening of the occurrence were seized by CBI yet no blood was found amid measurable examination. Murder weapons were not recouped quickly after the offense. One of the homicide weapon i.e. sharp edged instrument couldn’t be recuperated till date and master couldn’t discover any blood stain or DNA of unfortunate casualties from golf stick to straightforwardly interface it to the wrongdoing. There is no proof to clarify the fingerprints on the scotch jug (which were found alongside blood stains of both the unfortunate casualties on the jug). The gatekeepers of the state are versatile amid night and at the passageway they don’t make any section[xv]. Thusly, their announcements with respect to development of people may not be secure. The correct grouping of occasions between (in the mediating night of 15 – 16/05/2008) 00.08 mid night to 6:00 AM toward the beginning of the day isn’t clear. No proof has risen to demonstrate the reasonable job of Dr. Rajesh Talwar and Dr. Nupur Talwar, independently, in the commission of wrongdoing.  A leading group of specialists comprised amid before examination group has given a conclusion that the likelihood of the neck being cut by khukri can’t be discounted, in spite of the fact that specialists who have directed posthumous have said that cut was finished by precisely prepared individual with a little careful instrument. There is no proof to clarify the nearness of Hemraj’s versatile in Punjab after homicide. The offense has happened in an encased level thus no onlooker are accessible.

The blood drenched garments of the wrongdoers, garments used to clean the blood from the level and stair case, the sheet on which the Hemraj was conveyed and delayed the rooftop, the bed blanket which was utilized to cover the view from the steel press barbecue on the rooftop are not accessible and consequently couldn’t be recuperated.

All the above discoveries raised doubts about whether the killings were submitted by Dr. Rajesh and Nupur Talwar. Consequently they were subjected to narcoanalysis test to affirm their contribution in the wrongdoing. The CBI did narco – examination test on Nupur Talwar between February 8 and February 12, 2010[xvi] and on Rajesh Talwar between February 15 and 20, 2010 at

the Forensic Science Laboratory in Gandhinagar, Gujarat[i]. Notwithstanding, the examinations experienced a mental blackout.

No solid proof could be gathered even in the wake of leading the narco – trial of the Talwar couple that could help in further examinations for the situation. The test was led to see whether Nupur Talwar or Rajesh Talwar knew anything about the case, yet they don’t know anything diverse about the homicide of the young lady. In this specific case, the aftereffects of the narcoanalysis were permissible in court be that as it may, two years after the examination; the Supreme Court of India ruled it illegal yet let specialists utilize the test results for leads.

Narco – analysis has been censured on the ground that it isn’t hundred for each penny exact. It has been discovered that specific subjects put forth absolutely false expressions[xviii]. Usually unsuccessful in evoking truth all things considered it ought not to be utilized to contrast the announcement officially given with the police before utilization of medication. It has been discovered that a man has given false data even after organization of medication. It is extremely hard to propose a right dosage of medication for a specific individual. The measurement of medication will vary as per self – discipline, mental state of mind and physical make–up of the subject.


There is an urgent need for the application of forensic science in the criminal justice delivery system. The use of scientific or forensic evidence in criminal trials not only identifies the actual guilty but also prevents the innocent from being convicted wrongly.  The principle of the Indian legal system is based on the fact that until proved guilty, a person is innocent and an innocent cannot be convicted even if a hundred criminals are surrendered.With the above objective in mind, subjecting a person to narcoanalysis without his consent will be surely undermining his individual rights which are absolutely negating the principle of a right based society.The use of scientific proof in a forensic setting has proven problematic for both judges and attorneys because most of them are not technically trained. Much of the difficulty encountered by courts when facing scientific evidence lies not in a lack of understanding the underlying science but in the task of choosing between competing for scientific explanations.Law is a living process, which changes according to the changes in society, science, and ethics and so on. The Legal System should imbibe developments and advances that take place in science as long as they do not violate fundamental legal principles and are for the good of the society. The Central government must make a clear policy stand on narco analysis because what is at stake in India’s commitment to individual freedoms and a clean criminal justice systems.


[i] last visited on 3rd October 2018 at 7:34 p.m.

[ii] last visited on 3rd October 2018 at 7:34 p.m.

[iii] last visited on 2nd October 2018 at 12 p.m.

[iv] last visited on 2nd October 2018 at 12 p.m.

[v] last visited on 4th October 2018 at 2:15 p.m.

[vi] last visited on 9th October 2018 at 5:15 p.m.

[vii] 372 U.S. 293 (1963)

[viii] last visited on 8th October 2018 at 7:47 p.m.

[ix] last visited on 3rd October 2018 at 5:30 p.m.

[x] Anirban Roy Choudhary and Madhubani Chakraborty “Article 20 (3) of the Constitution of India and Narco – Analysis – Blending the much awaited” Symbosis Law School.

[xi]2006 CriLJ 2401

[xii] last visited on 10th October 2018 at 11 p.m.

[xiii] 2013 (82) ACC 303.

[xiv] last visited on 5th October at 12:45 a.m.

[xv]Nupur Talwar vs. Central Bureau of Investigation and Anr. AIR 2012 SC 1921

[xvi] last visited on 4th October 2018 at 1 p.m.

[xvii] last visited on 10th October 2018 at 11:24 a.m.

[xviii] last visited on 10th October 2018 at 11:24 a.m.




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