BACK TO BSA 2023(2010) 7 SCC 263(2009) 9 SCC 709
BSA 2023ACTIVE FRAMEWORKChapter IV
Section 39
Opinions of Experts
Of the Opinions of Third Persons — When Relevant
Quick Legal SummaryIEA IEA S.45
Statutory Snapshot
THE STATUTE
Original Text
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, or electronic evidence, the opinions upon that point of persons specially skilled in such foreign law, science or art, or in questions as to identity of handwriting, or finger impressions, or electronic evidence are relevant facts.
Such persons are called experts.
Explanation — When the court has to form an opinion on any matter relating to information transmitted or stored in any computer resource or any other electronic or digital form, the opinion of the Examiner of Electronic Evidence referred to in section 79A of the Information Technology Act, 2000, is a relevant fact.
Legal Commentary
BSA Section 39 adds 'or electronic evidence' to the IEA Section 45 categories of expert opinion. This seemingly small addition has significant practical implications for the growing body of digital evidence in criminal and civil cases.
**The 'electronic evidence' addition — formalising digital forensics:**
Under IEA Section 45, digital forensics experts testified as 'science' experts — their opinions were admitted under the broad 'science or art' category. This worked but was indirect. BSA Section 39's explicit 'electronic evidence' category:
1. Puts digital forensics experts on equal footing with fingerprint experts and handwriting examiners — they have their own named category.
2. Removes any doubt about the admissibility of specialist digital forensics opinions.
3. Covers: malware analysis, network intrusion forensics, smartphone forensics, social media authentication, CCTV analysis, encryption experts.
**The Updated Electronic Evidence Examiner Provision:**
BSA Section 39's Explanation updates the IT Act Section 79A Examiner of Electronic Evidence provision — ensuring consistency between the BSA and the IT Act framework for certifying electronic evidence experts.
**Interaction with BSA Section 57:**
BSA Section 57 (electronic records admissibility) and Section 39 (expert opinion on electronic evidence) work together: Section 57 gets electronic records admitted; Section 39 allows expert analysis of those records to be placed before the court. A digital forensics expert who analysed admitted electronic records gives opinion under Section 39.
**DNA, forensic pathology, psychiatry — unchanged:**
All existing science-category expert opinions (DNA, forensic pathology, psychiatry, ballistics, toxicology) remain under BSA Section 39's 'science or art' category, unchanged from IEA Section 45.
Legislative Intent & Background
BSA Section 39's explicit electronic evidence category responds to the explosion in digital evidence in Indian courts — cybercrime cases, online fraud, digital financial fraud, WhatsApp-based evidence — where digital forensics expertise is now as essential as fingerprint examination.Critical Provisions & Changes
'Or electronic evidence' added as an explicit expert category — formalises digital forensics expertise.
Electronic Evidence Examiner provision updated in the Explanation.
All IEA Section 45 categories preserved.
Expert opinion remains relevant but not conclusive — unchanged.
Landmark Judicial Precedents
Selvi v. State of Karnataka (2010)
Limits on expert opinion admissibility (narco-analysis, lie detectors) — applies under BSA Section 39.
Ramesh Chandra Agrawal v. Regency Hospital Ltd. (2009)
Expert opinion essential for technical questions — applies under BSA Section 39.
Practical Scenarios & Illustrations
Cybercrime case: prosecution's digital forensics expert explains how the accused accessed the victim's account — BSA Section 39 'electronic evidence' category; explicitly recognised expert opinion.
Terrorism case: encrypted communications expert explains decrypted messages and their metadata — BSA Section 39 expert opinion on electronic evidence.
Same as IEA Section 45 examples for DNA, handwriting, forensic pathology.
Questions & Answers
Yes — BSA Section 39 adds 'electronic evidence' as a named expert category alongside foreign law, science, art, handwriting, and fingerprints. Digital forensics experts — including specialists in smartphone analysis, network forensics, CCTV analysis, and malware examination — have explicit statutory recognition under BSA Section 39.
No — DNA evidence remains expert opinion under 'science' in BSA Section 39, identical to its treatment under IEA Section 45. The Supreme Court's case law on DNA evidence (chain of custody, laboratory accreditation, weight of evidence) continues to apply. DNA opinion is relevant but not conclusive.