Types of Witnesses under BSA/IEA: Legal Notes & Admissibility

The question of who may testify in a court of law, and in what manner their testimony is to be treated, is one of the foundational inquiries of the law of evidence. It reaches into the very heart of the adversarial system, and its answer determines not merely the admissibility but also the weight of what passes before a court as oral evidence. The four categories of witnesses — competent, interested, child, and expert — represent distinct situations that call for distinct legal analyses, each illuminated by statutory provisions and a rich body of judicial wisdom.

(a) The Competent Witness

The starting point of any discussion on witnesses is the question of competence — the capacity of a person to be received as a witness at all. Section 118 of the Indian Evidence Act, 1872 (IEA), now re-enacted as Section 124 of the Bharatiya Sakshya Adhiniyam, 2023 (BSA), lays down this foundation in terms that are sweeping and inclusive: "All persons shall be competent to testify unless the Court considers that they are prevented from understanding the questions put to them, or from giving rational answers to those questions, by tender years, extreme old age, disease, whether of body or mind, or any other cause of the same kind."

The genius of this provision is its presumptive character. Competency is the rule; incompetency is the exception. The burden of showing that a person is incompetent rests upon the party who alleges it, and in the absence of such proof, the court proceeds on the assumption that the person before it is a capable witness. As Sarkar, the distinguished evidence scholar, put it with characteristic precision: "Competency is the rule and incompetency is the exception."

The section lays down two tests — the test of comprehension and the test of communication. A witness must be able to understand the questions put to them and must be able to give rational answers. If either faculty is disabled — whether by extreme youth, senility, physical disease, or mental disorder — the court may declare the person incompetent. The Explanation to Section 118 of the IEA and Section 124 of the BSA explicitly addresses a person of unsound mind: a lunatic or a person of unsound mind is not incompetent merely because of that condition, but only if that condition actually prevents comprehension and rational response.

In Rameshwar v. State of Rajasthan (AIR 1952 SC 54), Justice Vivian Bose of the Supreme Court articulated with clarity that the question of competency is determined by the court's assessment of whether the witness understands questions and can give rational answers — and that an omission to administer an oath goes only to the credibility of the witness, not to competency. Gender, religion, prior criminal record, and moral character are entirely irrelevant to competence under Indian law.

Competence must also be understood as both general and specific. General competence, governed by Section 118 of the IEA and Section 124 of the BSA, determines whether a person can testify at all. Specific competence relates to whether the person has knowledge of the particular subject matter about which they are asked to depose. A child who is generally competent to testify about a murder she witnessed in her own home may lack specific competence to depose about the technical causes of death as determined by a pathologist.

(b) The Child Witness

Perhaps no witness requires more careful judicial handling than the child. The Evidence Act and the BSA, following the tradition established by Section 118 of the IEA and Section 124 of the BSA, lay down no minimum age requirement for competence. A child of any age may in principle testify, provided the court is satisfied that the child can understand the questions and give rational answers.

However, the administration of an oath to a child is a separate matter governed by Section 4 of the Oaths Act, 1969. The proviso to that section provides that if a child below twelve years of age understands the duty of speaking the truth but does not understand the nature of an oath or affirmation, the oath need not be administered — and this non-administration will not render the child's evidence inadmissible. The Supreme Court confirmed in Rameshwar v. State of Rajasthan (AIR 1952 SC 54) that the desirable practice is for the judge to record the opinion that the child understands the duty to speak the truth, and to explain the reasoning behind that finding.

Before a child is examined, the court conducts what is called a voir dire — a preliminary examination, literally an oath to tell the truth, in which the court puts general questions to the child to assess mental maturity and the ability to understand and respond. The child is not brought into the courtroom but, as modern practice and the Protection of Children from Sexual Offences Act, 2012 (POCSO) mandate, is examined in a child-friendly environment. Section 33 of the POCSO Act requires the Special Court to create a child-friendly atmosphere, allow a trusted family member to be present, avoid aggressive questioning, and prevent character assassination of the child.

The reliability of a child witness is a matter of great delicacy. Justice Arijit Pasayat of the Supreme Court, in Mohd. Kalam v. State of Bihar (2008) 7 SCC 257, observed that a child witness cannot be rejected outright but must be evaluated with greater circumspection, as a child is susceptible to tutoring and easily swayed by the suggestions of adults around it. It is a rule of prudence, though not an absolute rule of law, that the evidence of a child witness should ordinarily be corroborated. In Dattu Ramrao Sakhare v. State of Maharashtra (1997) 5 SCC 341, the court held that even in the absence of an oath, the evidence of a child witness can be considered if it is otherwise credible and reliable. The Supreme Court in Rajkumar v. State of Madhya Pradesh (2014) 5 SCC 353 restated the law: the deposition of a child witness may require corroboration, but if it inspires confidence and is consistent, the court may act on it, even without independent corroboration.

(c) The Expert Witness

In the ordinary run of cases, a witness deposes to facts — things they have seen, heard, or otherwise directly perceived. The expert witness is an exception to this ordinary position. Section 45 of the IEA and Section 39 of the BSA permit the court to receive opinions of persons specially skilled in any science, art, foreign law, handwriting, or finger impressions, when such opinions are relevant to the matter before the court. The rationale is simple: where the court itself lacks the specialised knowledge necessary to draw inferences from raw facts, it must call upon those who possess such knowledge to assist.

The expert witness is therefore defined not by what they have seen, but by what they know — their specialised knowledge in a defined technical field. A forensic pathologist who can determine cause of death from examination of a body, a ballistics expert who can trace a bullet to a particular weapon, a handwriting expert who can compare questioned and specimen signatures, a psychiatrist who can assess the sanity of the accused — all these persons bring to the witness box knowledge that the judge and jury do not themselves possess.

The opinion of the expert is not conclusive. This is of fundamental importance. The court is not bound to accept the expert's opinion; it is merely assisted by it. The expert is a guide, not an oracle. As the Supreme Court held in Ramesh Chandra Agrawal v. Regency Hospital Ltd. (2009) 9 SCC 709, the opinion of an expert is relevant but not binding, and the court must scrutinise it in the light of other evidence in the case. This approach was elaborated in State of Himachal Pradesh v. Jai Lal (1999) 7 SCC 280, where the Supreme Court said that the opinion of an expert must be tested against other material on record, and the court should not mechanically accept it without independent assessment.

An expert under Indian evidence law must possess actual specialised knowledge in the relevant field. The court has the power and the duty to test the expert's qualifications, the basis of their opinion, and the reliability of the method they have used. An expert who does not explain the basis of their opinion, or whose methodology is unsound, may find their evidence entirely discounted. Corroboration, in the form of scientific literature, established methods, and consistency with other evidence, lends the expert's opinion its weight.

(d) The Interested Witness

The interested witness has been the subject of perhaps the most extensive judicial discussion in Indian evidence law, primarily because the category is so easy to misuse. In common parlance, "interested" is used as a term of abuse — a suggestion that the witness is lying because they have something to gain from the outcome. The law does not accept this shorthand, and the Supreme Court has corrected it repeatedly with admirable firmness.

An interested witness is one who has a direct stake in the result of the litigation — a pecuniary or personal interest in securing a particular outcome, or one who bears enmity against the accused and wishes, for reasons of vengeance, to see him convicted. In Rajasthan v. Kalki (1981) 2 SCC 752, the Supreme Court drew the now-famous distinction between a related witness and an interested witness. The wife of the deceased, the court said, is undoubtedly related to the deceased — but she is not necessarily an interested witness. A witness is interested only when they derive some benefit from the result of the litigation, or when they bear animus against the accused. Relationship alone does not constitute interest in the legal sense.

Justice Vivian Bose captured the essential principle with characteristic elegance in Dalip Singh v. State of Punjab (AIR 1953 SC 364): "A witness is normally to be considered independent unless he or she springs from sources which are likely to be tainted and unless the witness has cause, such as enmity against the accused, to wish to implicate him falsely. Ordinarily a close relation would be the last to screen the real culprit and falsely implicate an innocent person." The Supreme Court in Rajasthan v. Teja Ram (AIR 1999 SC 1776) put it with great practical wisdom: "The over-insistence on witnesses having no relation with the victims often results in criminal justice going awry. When any incident happens in a dwelling house, the most natural witnesses would be the inmates of that house. It is unpragmatic to ignore such natural witnesses and insist on outsiders who would not have even seen anything."

The legal position is therefore this: the evidence of an interested witness is admissible, but is to be examined with greater care and scrutiny before it is acted upon. As the court held in State of Andhra Pradesh v. Punati Ramulu (AIR 1993 SC 2644), the relationship or partisan nature of the evidence only puts the court on its guard to scrutinise it more carefully. Upon scrutiny, if the court finds it credible and trustworthy, there is no bar to its acceptance as the basis of conviction.

The Problem: Father of the Deceased as Eye-Witness

The accused's objection in the trial for murder — that the father of the deceased is an interested witness and hence an incompetent witness — conflates two entirely distinct concepts that the law keeps carefully apart. The objection must fail on both counts: the father is neither incompetent nor required to be excluded on the ground of interest.

On Competence

Section 118 of the IEA and Section 124 of the BSA establish competence. The only grounds of incompetence recognised by the law are inability to understand questions and inability to give rational answers. Being the father of the deceased is not mentioned as a ground of incompetence anywhere in the Act. It cannot be a ground of incompetence under any interpretation, because competence is a matter of mental capacity — not of emotional relationship. The accused's objection, framed as one going to admissibility, therefore fails at the threshold. The father of the deceased, unless he is shown to be incapable of understanding questions or giving rational answers, is unquestionably a competent witness.

On Interest

The father of the deceased is certainly a witness with a natural interest in seeing the murderer of his child convicted. In the language of Raju Balachandran v. State of Tamil Nadu (Case No. 1614 of 2009, November 2012), the father belongs to the category of a "related and interested witness having an interest in seeing the accused punished." But this does not make his evidence inadmissible. It makes it testimony that requires careful scrutiny — no more and no less.

In Sewa Kaur v. State of Punjab (AIR 1997 SC 1843), the Supreme Court relied upon the testimony of the son of the deceased, who was produced as a natural eyewitness, and found his version corroborated by medical evidence and the recovery of the dead body. The court found no reason to discard the evidence merely because the witness was related to the deceased. The same principle operates with equal force when the father is the eyewitness.

Indeed, there is a logic in the opposite direction that Indian courts have recognised: a father who was present at the time of the murder and who actually saw the killing is the most natural witness the prosecution can produce. It would be entirely artificial and unreasonable to demand that the prosecution, instead of calling the eyewitness who was actually present, should search for a stranger who may not have been present at all. As the Supreme Court observed in Mano Dutt v. State of UP (2012) 4 SCC 79, it is only the family members who go to the rescue of the victim — and it would be a travesty of justice to silence them in the name of impartiality.

The Correct Position

The court should overrule the accused's objection. The father of the deceased is a competent witness and his evidence is admissible. However, the court must apply the rule of prudence — it must scrutinise the father's evidence with care, looking for internal consistency, corroboration by medical or other independent evidence, and the absence of any reason to believe that he is falsely implicating the accused out of sheer enmity rather than truthful recollection. If his evidence inspires confidence after that scrutiny, the court may act upon it and base a conviction on it, even without independent corroboration from a disinterested third party.

The objection that a related witness is an incompetent witness is not merely legally wrong — it is a proposition that, if accepted, would devastate the prosecution of crimes committed in family settings, where the natural witnesses are always going to be those closest to the victim. Indian courts have, over a long judicial history, firmly and repeatedly rejected this proposition, and the father of the deceased in a murder trial stands before the court as a fully competent, admissible, though carefully scrutinisable, eyewitness.