Expert testimony in biotech criminal cases

Introduction

Expert testimony in biotechnology criminal cases refers to scientific evidence provided by specialists to assist courts in understanding technical issues involving biotechnology, genetic engineering, pharmaceuticals, biological materials and laboratory procedures. Such cases may involve illegal genetic experimentation, unauthorised handling of hazardous microorganisms, pharmaceutical fraud, biological evidence manipulation, unlawful clinical trials or violations of biosafety regulations.

Biotechnology-related criminal cases often involve complex scientific questions that cannot be properly evaluated through ordinary factual evidence alone. Expert witnesses therefore help courts understand laboratory findings, genetic evidence, toxicological reports, biological risks and the scientific methods used during investigations.

In India, expert testimony plays an important role in ensuring that criminal decisions are based on reliable scientific evidence, procedural fairness and established legal standards.

Meaning and importance of expert testimony

Expert testimony is evidence given by a person possessing specialised knowledge, training or experience in a particular scientific or technical field. In biotechnology criminal proceedings, experts may include molecular biologists, geneticists, forensic scientists, microbiologists, toxicologists and pharmaceutical researchers.

Their primary responsibility is to explain scientific findings objectively rather than support the prosecution or defence.

The major purposes include:

Explaining complex biological and genetic evidence.

Identifying biological substances and microorganisms.

Interpreting DNA and laboratory test results.

Examining alleged scientific misconduct or manipulation.

Assessing compliance with biosafety requirements.

Establishing the reliability of forensic testing.

Helping courts distinguish scientific facts from assumptions.

Expert testimony is particularly important when criminal liability depends on whether a biological activity was dangerous, unauthorised or conducted through fraudulent scientific procedures.

Legal framework in India

1. Bharatiya Sakshya Adhiniyam, 2023

The Bharatiya Sakshya Adhiniyam, 2023 (BSA), which came into force on 1 July 2024, governs the admissibility and evaluation of evidence in applicable Indian proceedings.

Section 39 deals with opinions of experts. When a court has to form an opinion on matters involving science, art, foreign law or specialised fields, the opinions of persons specially skilled in those subjects become relevant.

In biotechnology criminal cases, this provision may cover expert opinions concerning genetic testing, molecular biology, microbiological analysis, pharmaceutical composition and laboratory procedures.

Expert opinion is relevant evidence, but it is not automatically conclusive. Courts must evaluate its scientific foundation, reliability and consistency with other evidence.

2. Bharatiya Nagarik Suraksha Sanhita, 2023

The Bharatiya Nagarik Suraksha Sanhita, 2023 (BNSS), provides the procedural framework for criminal investigations and trials.

Its provisions concerning forensic investigation, examination of witnesses and production of evidence are relevant when scientific experts participate in biotechnology-related criminal proceedings.

3. Information Technology Act, 2000

Biotechnology investigations may involve digitally stored laboratory records, electronic research data, genetic databases and computer-generated scientific reports.

The Information Technology Act, 2000, addresses several cyber offences and provides legal recognition to electronic records. Their evidentiary treatment must also comply with the BSA.

4. Environment (Protection) Act, 1986

The Environment (Protection) Act, 1986, and the Rules of 1989 regulate specified activities involving hazardous microorganisms and genetically engineered organisms.

Expert evidence may be required to establish whether prohibited or unauthorised activities occurred, whether safety requirements were violated and whether environmental harm resulted.

Role of expert witnesses in biotechnology criminal cases

1. DNA and genetic evidence

Forensic genetic experts may explain DNA profiling, biological sample identification and the limitations of genetic comparisons. Their testimony can assist courts in determining whether biological evidence connects an accused person with an alleged offence.

However, experts must explain possible contamination, sample degradation, laboratory errors and statistical limitations.

2. Pharmaceutical and clinical research fraud

Pharmaceutical experts may examine allegations involving falsified clinical trial records, manipulated research results, unauthorised drug manufacturing or misleading safety claims.

They can assess whether laboratory procedures followed recognised scientific standards and whether submitted results were deliberately misrepresented.

3. Biosafety violations

Microbiologists and biosafety specialists may explain whether biological materials were handled in accordance with applicable safety requirements. Their opinions may assist in establishing the technical circumstances surrounding an alleged regulatory violation.

4. Scientific misconduct and data manipulation

Digital forensic experts and laboratory specialists may examine altered experimental records, fabricated datasets, manipulated research images and unauthorised access to scientific databases.

Their evidence can help establish the authenticity and integrity of research records.

Important case laws

1. State of H.P. v. Jai Lal (1999)

The Supreme Court explained that expert opinion becomes relevant when a court must form an opinion on a specialised subject. It also observed that an expert must possess special skill or knowledge and that the court must independently evaluate the opinion.

This judgment is highly relevant to biotechnology criminal cases because scientific experts must explain the basis of their conclusions rather than merely present unsupported opinions.

2. Murari Lal v. State of Madhya Pradesh (1980)

The Supreme Court discussed the evidentiary value of expert opinion and recognised that expert evidence should be assessed carefully alongside other evidence. The judgment is relevant when courts evaluate scientific reports involving genetic identification or laboratory analysis.

3. State of Maharashtra v. Damu (2000)

The Supreme Court considered the evidentiary value of scientific and forensic material in a criminal investigation. The judgment demonstrates how scientific evidence can assist criminal courts, while requiring proper evaluation of the surrounding circumstances.

4. Selvi v. State of Karnataka (2010)

The Supreme Court examined the constitutional limits of involuntary scientific techniques, including narcoanalysis, polygraph examinations and brain electrical activation profile tests. It held that involuntary administration violated constitutional protections under Articles 20(3) and 21.

The decision is important in biotechnology-related criminal investigations because scientific techniques cannot be used to override individual dignity, personal liberty and constitutional protections.

5. Pattu Rajan v. State of Tamil Nadu (2019)

The Supreme Court examined the evidentiary value of DNA profiling and explained that DNA evidence is relevant but must be evaluated in the context of the entire case. The judgment is particularly important for biotechnology criminal proceedings involving genetic testing and forensic laboratory reports.

Requirements for reliable expert testimony

Expert testimony must satisfy standards of scientific reliability and procedural fairness. Courts should examine the expert's qualifications, experience, methodology and access to original laboratory records.

Important considerations include:

Whether the expert has relevant scientific qualifications.

Whether recognised testing methods were followed.

Whether samples were properly collected and preserved.

Whether the chain of custody was maintained.

Whether laboratory equipment was properly calibrated.

Whether the findings can be independently verified.

Whether the expert has disclosed methodological limitations.

Whether the expert has any personal or financial conflict of interest.

The defence must also receive a fair opportunity to challenge scientific conclusions through cross-examination and, where legally permissible, independent expert evidence.

Challenges and safeguards

One major challenge is the increasing complexity of biotechnology. Advanced genetic sequencing, synthetic biology and artificial intelligence-based laboratory systems may produce evidence that is difficult for ordinary courts to interpret.

Other concerns include contaminated samples, inaccurate laboratory results, biased expert opinions, incomplete digital records and inconsistent testing standards.

To address these problems, courts and investigating agencies should promote independent forensic laboratories, standardised testing protocols, proper documentation and transparent expert reporting.

Expert witnesses should clearly distinguish established scientific findings from probabilities, assumptions and emerging hypotheses. Courts should avoid treating scientific opinions as unquestionable proof of criminal guilt.

Conclusion

Expert testimony is essential in biotechnology criminal cases because it enables courts to understand complex scientific evidence and evaluate alleged violations of law. Section 39 of the Bharatiya Sakshya Adhiniyam, 2023, provides the principal evidentiary foundation for expert opinions in applicable proceedings. Judicial decisions such as State of H.P. v. Jai Lal, Pattu Rajan v. State of Tamil Nadu and Selvi v. State of Karnataka establish important principles concerning scientific evidence, expert reliability and constitutional safeguards. An effective system must combine scientific accuracy, independent expertise and procedural fairness to ensure that biotechnology-related criminal cases are decided on reliable evidence.