From Barrel to Bench: How a Sessions Court Should Deal With Ballistic Reports in Firearm Trials?

1. Statutory backdrop: expert opinion and ballistics

In cases involving firearms, the court has to form an opinion on scientific matters such as type of weapon, working condition, range of fire, and whether a particular bullet or cartridge was fired from a particular weapon. These areas lie beyond common judicial experience and fall within “science” under Section 45 of the Indian Evidence Act and its successor provision, Section 39 of the Bharatiya Sakshya Adhiniyam, 2023.

A ballistic expert is a person specially skilled, by study and experience, in firearms, ammunition, trajectories and related forensic examination, and his opinion is a relevant fact when such scientific questions arise in the trial. However, the evidence of an expert is advisory; it is to assist, not to bind, the court, and must be weighed with the entire evidence on record.

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What is Expert Evidence as per S 39 of BSA?

 Expert evidence refers to testimony provided by a person who possesses specialized knowledge, skills, or experience in a particular field relevant to a legal case. This expertise enables them to provide opinions that are beyond the understanding of the average person and assists the court in reaching informed decisions on complex or technical matters.

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Beyond the Double Helix: Supreme Court's Emphasis on Random Match Probability and Chain of Custody in DNA Evidence Analysis

 In the case of Manoj v. State of Madhya Pradesh (2022) , the Supreme Court of India emphasized significant concerns surrounding the trustworthiness of DNA evidence, specifically the potential for contamination. The Court determined that the lack of a random occurrence ratio in the DNA analysis could give rise to substantial uncertainties regarding the precision and dependability of the evidence. The significance of this ratio is in its ability to offer a statistical indication of the likelihood of encountering a specific DNA profile within the overall population. The credibility of the DNA evidence is impaired if we do not take into account the 'random match probability', which measures the possibility of a DNA profile randomly matching someone other than the suspect. The Court emphasized the need of including this statistical probability in order to build a strong and scientifically valid foundation for DNA matches. This ensures that the evidence can withstand scrutiny and serve as a dependable basis for judicial decisions.

 IN THE SUPREME COURT OF INDIA

Criminal Appeal Nos. 248-250 of 2015

Decided On: 20.05.2022

Manoj and Ors. Vs. State of Madhya Pradesh

Hon'ble Judges/Coram:

U.U. Lalit, S. Ravindra Bhat and Bela M. Trivedi, JJ.

Author: S. Ravindra Bhat, J.

Citation: MANU/SC/0711/2022.

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Supreme Court: From Crime Scene to Courtroom: DNA Evidence Collection, Analysis and Legal Requirements

 DNA evidence constitutes opinion evidence as contemplated under Section 45 of the Indian Evidence Act, and like any other opinion evidence, its probative value varies from case to case. The courts must evaluate DNA evidence with appropriate scrutiny while considering its scientific foundation and procedural compliance.

DNA Profiling: Scientific Methodology and Process

Nature of DNA Evidence

·       DNA (Deoxyribonucleic acid) is genetic material present in cell nuclei, composed of four nucleotides: Adenine (A), Guanine (G), Thymine (T), and Cytosine (C).

·       Only 0.1% of DNA differs between individuals, with forensic scientists analyzing variable regions to generate unique DNA profiles

·       Current genetic markers of choice for forensic purposes are Short Tandem Repeats (STRs)

DNA Profiling Methodology

The DNA profiling process involves four sequential steps:

·       Isolation, purification and quantitation of DNA

·       Amplification of selected genetic markers

·       Visualizing fragments and genotyping

·       Statistical analysis and interpretation

Statistical Analysis and Interpretation Standards

Three Possible Outcomes of Profile Comparison:

·       Match: DNA profiles from two samples are indistinguishable

·       Exclusion: Profile differences indicate different biological sources

·       Inconclusive: Data insufficient for definitive conclusion

Random Match Probability (RMP): Statistical calculations must support any declared "match" by estimating the frequency of the particular DNA profile in a population.

Collection and Preservation Requirements

Legal and Scientific Prerequisites

DNA evidence must be properly documented, collected, packaged, and preserved to meet legal and scientific requirements for court admissibility. Contamination risks require heightened attention during:

·       Location and identification of biological specimens

·       Collection and packaging procedures

·       Chain of custody maintenance

·       Laboratory transmission protocols

Evidentiary Standards and Judicial Scrutiny

Quality Control Requirements

Courts have emphasized that DNA profile validity and reliability depend on quality control and quality assurance procedures in the laboratory. The mere exhibition of DNA reports without examining their underlying basis renders such evidence "highly vulnerable".

Burden of Proof Standards

·       DNA evidence may be more useful for investigation purposes than for raising presumptions of identity in court

·       Courts must examine whether DNA techniques were reliably applied by experts

·       Possibility of sample tampering during storage periods affects evidential weight

Precedential Guidelines

International Standards: Following R v. Dohoney & Adams, courts should require:

·       Scientist testimony on DNA comparisons with random occurrence ratio calculations

·       Prosecution disclosure of calculation methodologies to defense

·       Defense expert access to databases underlying the calculations

Judicial Observations: DNA testing provides "powerful new evidence unlike anything known before" and can determine biological tissue matches "with near certainty," while simultaneously serving to exonerate wrongly convicted individuals and confirm valid convictions.

Legal Principle Established

DNA evidence, while scientifically advanced and potentially conclusive, requires strict adherence to collection protocols, chain of custody procedures, and quality control standards. Courts must scrutinize both the scientific methodology employed and the procedural compliance achieved before according probative value to such evidence in criminal proceedings.

 IN THE SUPREME COURT OF INDIA

Criminal Appeal Nos. 611, 612-613 and 614-615 of 2022

Decided On: 07.11.2022

Rahul Vs. State of Delhi, Ministry of Home Affairs and Ors.

Hon'ble Judges/Coram:

U.U. Lalit, C.J.I., S. Ravindra Bhat and Bela M. Trivedi, JJ.

Author: Bela M. Trivedi, J.

 Equivalent Citations

2022 SCC ONLINE SC 1532,2023 SCC 1 83,2022 AIR SC 5661,2022 INSC 1176, MANU/SC/1455/2022

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DNA Evidence in Criminal Proceedings: Scientific Foundations and Legal Framework

 Introduction

DNA evidence has revolutionized forensic science and criminal investigations, providing unprecedented accuracy in identifying biological materials and establishing connections between suspects, victims, and crime scenes. However, the admissibility and probative value of DNA evidence in criminal proceedings requires careful judicial scrutiny of both its scientific methodology and procedural compliance.

Legal Classification: DNA as Opinion Evidence

DNA evidence constitutes opinion evidence under Section 45 of the Indian Evidence Act, and like any other opinion evidence, its probative value varies from case to case. This classification requires courts to evaluate DNA evidence with the same rigorous standards applied to expert testimony, ensuring that the scientific foundation and methodology meet established legal requirements.

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Leading Supreme Court Judgment on appreciation of evidence of Expert witness

An expert witness, is one who has made the subject upon which he speaks a matter of particular study, practice, or observation; and he must have a special knowledge of the subject. Shri P.C. Panwar in his evidence has stated that he passed B.Sc. (Agriculture) Hons. from University of Delhi in 1959; thereafter he did his M.Sc. (Hon.) in 1967 from Punjab University. He joined the Agricultural Department in the year 1969 as a Research Assistant; he was promoted as Horticulture Development officer in the year 1973 and at the time of the assessment he was working as District Horticulture Officer, Shimla. He has also stated that in the year 1986 he attended a 3 months training course on apple technology in the University of Tasmania Australia. The assessment in the Orchards in question were made on different dates in November 1984. He has fairly accepted the suggestion that he had not received any training with respect to assessment of apple crop but that has been a part of his job. The witness could not state the number of scab cases in which he had been called upon to make assessment. He has specifically stated in the case against Jai Lal and others that was his first and last assignment till date as a commission for assessing productivity of an apple orchard.

15. On a perusal it is clear that many entries in the report need to be explained. Many of the trees of the orchards; their expected production of the tree is shown as nil. No reason whatsoever is stated in the report why the witness felt that the tree had no productive capacity. The assessment made by this witness appears to have been made on some sort of calculation the basis of which is not stated in the report; nor does the report disclose the reason for the end-result arrived at by the assessor. While judging the acceptability and reliability of the report it is to be borne in mind that Shri Panwar visited the Orchards only in the succeeding year and that too after the apple season of that year was over. Judged in this background the High Court cannot be faulted for having held that the report of the assessor is based more on surmises and conjunctures than actual observations or on scientific reasons.

17. Section 45 of the Evidence Act which makes opinion of experts admissible lays down that when the Court has to form an opinion upon a point of foreign law, or of science, or art, or as to identity of handwriting or finger impressions, the opinions upon that point of persons specially skilled in such foreign law, science or art, or in questions as to identify of handwriting, or finger impressions are relevant facts. Therefore, in order to bring the evidence of a witness as that of an expert it has to be shown that he has made a special study of the subject or acquired a special experience therein or in other words that he is skilled and has adequate knowledge of the subject.

18. An expert is not a witness of fact. His evidence is really of an advisory character. The duty of an expert witness is to furnish the Judge with the necessary scientific criteria for testing the accuracy of the conclusions so as to enable the judge to form his independent judgment by the application of this criteria to the facts proved by the evidence of the case. The scientific opinion evidence, if intelligible, convincing and tested becomes a factor and often an important factor for consideration along with the other evidence of the case. The credibility of such a witness depends on the reasons stated in support of his conclusions and the data and materials furnished which form the basis of his conclusions.

19. The report submitted by an expert does not go in evidence automatically. He is to be examined as a witness in Court and has to face cross-examination. This Court in the case of Hazi Mohammed Ikramul Hague v. State of West Bengal MANU/SC/0116/1958 : AIR1959SC488 concurred with the finding of the High Court in not placing any reliance upon the evidence of an expert witness on the ground that his evidence was merely an opinion unsupported by any reasons.

IN THE SUPREME COURT OF INDIA

Crl.A. No. 530 of 1997 etc.

Decided On: 13.09.1999

State of Himachal Pradesh  Vs.  Jai Lal and Ors.

Hon'ble Judges/Coram:

K.T. Thomas and D.P. Mohapatra, JJ.

Citation: AIR 1999 SC 3318,1999 (7) SCC 280

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Procedure to be followed by court for appointing guardian to lunatic in civil suilt

Civil - unsoundness of mind - Order 32 Rule 15 of Code of Civil Procedure, 1908 - to declare a person lunatic only evidence of medical expert be upheld - Order of Judge dismissing petition for appointment of next friend set aside - Judge failed to examine plaintiff under Order 32 Rule 15 of Code - Order passed is illegal - opinion of doctor held to be opinion of expert under Section 45 of Evidence Act - petition remanded to Court below.

 From these decisions, the fallowing principals emerge :

(1) Order XXXII, Rule 15 C. P. C. places persons of unsound mind or persons so adjudged in the same position as minors for purposes of Rules. 1 to 14.

(2) Order XXXII Rule 15 C. P. C. applies not only to a person adjudged to be of unsound mind, as under the old Code, but also to a person of weak mind.

(3) Where it is alleged that a party to a suit is of unsound mind, and the other party denies it, the Court must hold a Judicial inquiry, and come to a definite conclusion, as to whether by reason of the unsoundness of mind or mental infirmity, he is incapable of protecting his interests in the suit.

(4) Mental infirmity may even be due to physical defects, if it renders him incapable of receiving any communication, or of communicating his wishes or thoughts to others.

(5) Whether a person is of unsound mind or mentally infirm for the purpose of the rule and the extent of the infirmity has to be found by the Court on inquiry.

(6) Where the question of unsoundness of mind arises not only under Order XXXII, Rule 15 C. P. C. but is also one of the issues in the suit, the Court has amole jurisdiction to enquire into that question, and for that purpose seek medical opinion.

(7) The enquiry should consist not only of the examination of the witnesses produced by either party, but also of the examination of the alleged lunatic by the judge, either in open court or chambers, and as Courts are generally presided over by lay-men, as a matter of precaution, the evidence of medical expert should be taken.

(8) Of course, the opinion, of a doctor, as is the opinion of any other expert, under Section 45 of the Evidence Act, is only a relevant piece of evidence.

(9) The Court may also compel the attendance cf the alleged lunatic before it, and to submit himself for medical examination. If the alleged lunatic is in custody, the Court may direct the next friend or any other person having custody to produce him before the medical expert for examination.

(10) Where the precaution of judicial enquiry is not observed, the person cannot be declared lunatic, and a guardian cannot be appointed for him.

(11) When a person is adjudged a lunatic Irregularity and improperly, and notice was not served on him, and a guardian alone was allowed to appear and defend the suit and decree was passed owing to the guardian not gutting up a proper defence, the alleged lunatic can treat the decree against him as an ex parte decree, and have it set aside under O. IX Rule 13 C. P. C.

Andhra High Court

Duvvuri Rami Reddi vs Duvvudu Papi Reddi And Ors. on 20 April, 1962

Equivalent citations: AIR 1963 AP 160

Bench: Venkatesam

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