Failure To Subject Seized Contraband To Chemical Analysis Vitiates Prosecution Under NDPS Act: Kerala High Court

"The sensory perception of a human is not standardised or a constant, and therefore cannot substitute proof. If a person is permitted to be prosecuted merely on the basis of smell from his breath, it can lead to anomalous situations." Kerala High Court, in a ruling, has categorically held that the failure of the prosecution to subject alleged contraband articles to scientific chemical analysis renders a charge under the Narcotic Drugs and Psychotropic Substances Act (NDPS Act) unsustainable.

Justice C.S. Dias, while quashing criminal proceedings against an accused, emphasized that subjective sensory perception by an investigating officer cannot serve as a valid substitute for forensic evidence in criminal trials.

The petitioner sought to quash the final report in a case registered by the Kovalam Police for an alleged offence under Section 27(b) of the NDPS Act. The prosecution alleged that the petitioner was apprehended while smoking a beedi containing ganja. The petitioner contended that as the seized material was never sent for chemical analysis, the prosecution's case rested solely on the investigating officer's subjective suspicion.

The court was primarily tasked with determining whether a charge under the NDPS Act can be sustained in the absence of a chemical analysis report. Furthermore, the court examined whether the "olfactory abilities" or sensory assessment of an investigating officer constitute sufficient evidence to establish the commission of a drug-related offence.

Requirement of Forensic Proof

The court underscored that the legitimacy of a criminal prosecution under the NDPS Act is tethered to the scientific verification of the substance in question. Relying on established precedents, the court observed that a charge cannot be maintained if the seized items are not subjected to a rigorous forensic examination.

"The mandate for chemical analysis is absolute"

The bench reaffirmed the principles laid down in Anurag Shaji v. State of Kerala, stating that the absence of a chemical analysis report creates an evidentiary vacuum that prevents the prosecution from proving the essential ingredients of the offence. Without such verification, the court found the prosecution's case to be fundamentally flawed and unsustainable in the eyes of the law.

"Olfactory Perception Is Not Legal Proof"

The court expressed deep skepticism regarding the reliance on the subjective smell or sensory perception of police officers to initiate criminal proceedings. It noted that since such human perceptions are neither standardized nor constant, they cannot be elevated to the status of legal proof.

"If a person is permitted to be prosecuted merely on the basis of smell from his breath, it can lead to anomalous situations where the Investigating Officer would rope in any person in an NDPS offence."

Judicial Caution Against Arbitrary Prosecution

Justice Dias highlighted the danger of allowing investigations to proceed based on non-standardized personal perceptions. The court reasoned that permitting such a practice would grant unfettered discretion to investigating officers, potentially leading to the arbitrary harassment of citizens and the abuse of process under the NDPS Act.

Concluding that the proceedings against the petitioner lacked the necessary forensic foundation, the court quashed the FIR and the subsequent charge sheet. The ruling serves as a significant check on investigative practices, reinforcing that in matters of serious criminal law, objective scientific evidence must always prevail over the subjective assumptions of the investigating agency.

Date of Decision: 31 August 2026