SC ISSUES GUIDELINES ON DNA EVIDENCE: HIGHLIGHTS THE URGENCY FOR ADDRESSING WRONGFUL INCARCERATION

July 19, 2025by Primelegal Team

Introduction

The Indian Hon’ble SC in the case of “Kattavellai v. State of Tamil Nadu” rendered a milestone judgment that gives importance to forensic discipline and its procedural fairness in criminal trials. The court not only overturned a death penalty conviction for investigatory lapses but also promulgated binding guidelines for the management of DNA evidence and urged the parliament to ponder compensation structures for those who are acquitted after years in prison. The judgment of the sc is nan alarm that the constitution guarantees justice and liberty of every individual under Article 21, and a significant milestone towards consolidating accountability in the criminal justice system. 

 

Background

The case involved a double murder in May 2011, where the accused, Kattavellai, was said to have murdered two people after issuing a demand for money and gold. Circumstantial evidence, post-arrest confession, and DNA testing were the primary reliance of the prosecution. The accused was convicted by the Trial Court under Sections 302, 376, and 379 of the IPC and was given the death sentence. The High Court also convicted the accused. But the Supreme Court, in appeal, detected drastic procedural flaws in evidence gathering, particularly the DNA evidence, and serious flaws in the prosecution’s case. Upon minute examination, the Court exonerated the appellant for failure to link a complete chain of circumstantial evidence and the contaminated DNA process.

 

Key Points

  1. Failure of circumstantial evidence: The Court rules that the circumstantial evidence did not prove guilt beyond a reasonable doubt. There was no eyewitness, no reliable last seen evidence, and contradictions in the timelines and testimonies of the prosecution.
  2. Abuse of DNA Evidence: DNA evidence or sample was delayed, negligentlyhandleds, and had no chain of custody documentation. The court rejected the DNA report, calling it unreliable and compromised. 
  3. Failure to examine a material witness: A very important prosecution witness claimed to have witnessed the occurrence was never questioned, which gave a profound impression of incomplete investigation.
  4. DNA Handling Guidelines: The court laid down binding guideline,s including: FIR and investigation datails documentation.48-hour deadline for submission of laboratory tests.No opening of packages except with court order and medical opinion.Keeping a chain of custody register.
  • FIR and investigation datails documentation.
  • 48-hour deadline for submission of laboratory tests.
  • No opening of packages except with court order and medical opinion.
  • Keeping a chain of custody register.
  1. Compensation for Long Incarceration: The Court noted that long imprisonment after clean acquittal can constitute violation of Article 21. It called upon the Legislature to establish a statutory compensation scheme for such miscarriages. 

 

Recent Development

Strengthening Foresic Accountability: This ruling is part of a developing trend in which courts insist on rigorous forensic protocols and documentation to uphold the integrity of scientific evidence.

Enforcement of Article 21 Rights: More and more courts are recognizing that wrongful prosecution and delayed trials are a violation of personal liberty and dignity, and demand state accountability.

Judicial Pressure for Legislative Reforms: As evident from this and other recent judgments courts are pushing Parliament to enact policies on compensation for wrongful incarceration.

Shift from Death Penalty Jurisprudence: The Court’s cautiousness towards capital punishment based on circumstantial evidence alone is symptomatic of a wider judicial trend of **placing greater emphasis on higher standards of proof.

 

Conclusion

The Kattavellai judgment is a critical intervention in the Indian criminal justice system. In reversing a death sentence founded on tainted forensic evidence and unfinished investigation, the Supreme Court reaffirmed the preeminence of fair trial assurances and constitutional safeguards. The DNA evidence handling guidelines provide a badly needed road map on procedure, and the commentary on compensation for the long-incarcerated promise to open doors to a more just and humane system of law. This decision not only reaffirms the worth of due process but also redefines institutional obligation in the assurance that justice is not just done, but perceived to be done.

 

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WRITTEN BY AYUSHI TRIVEDI