Forensic DNA Evidence Must Be Supported by a Proved Chain of Custody; Kidnapping Applies to a Major with Intellectual Disability as a “Person of Unsound Mind”

3.1 Precedents Cited

Criminal Appeal No. 1672 OF 2019; Kattavelai @ Devakar versus State of Tamil Nadu

The High Court relied on the Supreme Court’s recent observations in Criminal Appeal No. 1672 OF 2019; Kattavelai @ Devakar versus State of Tamil Nadu, particularly the directive emphasising that:

• A Chain of Custody Register should be maintained “right from the point of collection” to the case’s end (conviction/acquittal), recording each movement of evidence with countersignatures and reasons.
• The register should be appended to the trial record, and failure to maintain it requires the IO to explain the lapse.

In the present judgment, this precedent functioned less as a rule of admissibility and more as a yardstick of reliability: scientific conclusions are only as trustworthy as the documented integrity of the evidence pipeline. The Court used the precedent to justify a stricter scrutiny of how the underwear and other biological materials were seized, sealed, stored (malkhana), produced before court, and forwarded to the FSL.

3.2 Legal Reasoning

(A) Medical evidence: suggestive but not determinative

The Court noted that the victim’s medical examination occurred about three days after the incident (though the judgment text contains an internal date inconsistency at one place), and the supplementary report found no spermatozoa and stated that no definite opinion regarding rape could be given (while not ruling out the possibility). The Court treated these findings as insufficient, by themselves, to prove rape or identify perpetrators.

(B) Forensic/DNA evidence: corroborative in principle, but only if chain of custody is proved

The prosecution relied heavily on FSL results: semen and blood were detected on the victim’s salwar and Bhup Singh’s underwear, and DNA from Bhup Singh’s underwear matched both the victim and Bhup Singh. Yet the High Court drew a crucial distinction between:

• Scientific outcome (what the lab reports), and
• Legal reliability (whether the tested item is proved to be the same item seized from the accused/victim and preserved without risk of substitution/contamination).

For Bhup Singh, the Court found the foundational chain lacking: it specifically noted the absence of a contemporaneous seizure memo/recovery document evidencing collection of the underwear from his possession, missing clarity on malkhana entries and handling, and the non-examination of the constable who transported the exhibits to the FSL. On this reasoning, the Court held that the possibility of tampering/substitution could not be ruled out and thus the forensic linkage lost “evidentiary sanctity” as a basis for conviction.

For Mool Chandra, the Court treated forensic evidence as exculpatory: no semen/blood/DNA linked him to the assault; even his jeans yielded nothing incriminating. In the Court’s analysis, suspicion based on association/last seen could not bridge the gap to proof of rape.

(C) Gang rape (Section 376-D IPC): collapses without proof of multi-person participation in furtherance of common intention

The Court underlined the statutory structure of Section 376-D IPC: it requires (i) rape by more than one person, and (ii) participation in furtherance of common intention. Once the evidence did not legally prove rape against either accused (for different reasons—lack of reliable forensic foundation for Bhup Singh, and forensic exclusion for Mool Chandra), the legal basis for 376-D necessarily failed.

(D) CCTV and Section 65-B Evidence Act: admitted without objection; used as corroboration of “taking”

The defence challenged the CCTV’s admissibility. The Court recorded, however, that a Section 65-B certificate was produced through PW-6, and the CCTV was marked as Exhibit 19-KA without objection at the time of marking. The Court therefore treated it as part of the evidentiary record.

Importantly, the Court used the CCTV narrowly: it showed the victim being led by a person identified as Mool Chandra, but did not show Bhup Singh and did not depict any assault. Its legal role was thus corroborative of kidnapping/taking away, not proof of rape.

(E) Kidnapping from lawful guardianship (Sections 361/363 IPC) applied despite the victim being a major

The judgment’s most doctrinally significant move is its treatment of Section 361 IPC beyond minority. The Court held that Section 361 includes taking a person of unsound mind out of the keeping of the lawful guardian without consent. It reasoned that:

• The victim, though 18–20 years, was consistently shown to have intellectual disability and inability to make an informed choice.
• Her dependence on family care and lack of independent decision-making capacity brought her within the protective rationale of Section 361.
• Therefore, Mool Chandra’s act of taking her away (proved by family testimony and corroborated by CCTV/CDR) satisfied the ingredients of Section 363 IPC.

This reasoning effectively separates biological majority from functional capacity in applying guardianship-protection offences.

(F) Section 376(2)(l) IPC: “unable to communicate consent”

The Court explained that “unable to communicate consent” extends beyond physical inability to include intellectual disability impairing comprehension and meaningful communication. While the Court acknowledged this aggravated-rape framework, it still insisted that the State must prove the accused’s involvement beyond reasonable doubt. Vulnerability heightens judicial sensitivity, but does not dilute the standard of proof.

3.3 Impact

• Forensic governance and trial practice: The judgment reinforces that DNA/forensic reports, however incriminating, are not self-authenticating proof of guilt. Courts may insist on documentary and testimonial proof of seizure, sealing, malkhana custody, forwarding, and receipt—aligning trial evaluation with the discipline urged in Kattavelai @ Devakar. Practically, this encourages police/prosecution to institutionalise chain-of-custody documentation and to examine “link witnesses” (malkhana in-charge, carrier constable, etc.).
• Doctrinal clarification on Section 361 IPC: By affirming Section 363 for taking away a major with intellectual disability as a “person of unsound mind,” the judgment provides a concrete template for applying guardianship-protection provisions to adults lacking functional capacity—likely to influence future cases involving cognitive disability, autism spectrum conditions, severe intellectual impairment, or similar vulnerabilities (subject to evidence).
• Constraining overreach in sexual offence convictions: The decision reiterates that moral shock or suspicion cannot substitute proof, particularly where (i) medical evidence is inconclusive, (ii) electronic evidence is limited to movement, and (iii) forensic evidence is procedurally unsupported.
• Electronic evidence handling: It signals that failure to object at the time of exhibition of a Section 65-B certificate can significantly narrow later admissibility challenges, though courts may still assess weight and scope (here: movement, not assault).