Karnataka High Court Scrutinizes Tamper-Proof Nature of Police Breathalysers

Bengaluru, Karnataka – The Karnataka High Court has cast a critical eye on the operational integrity of breathalysers used by traffic police, raising fundamental questions about their reliability and susceptibility to tampering. In a move that could have significant ramifications for the prosecution of drunk driving cases across the state, the Court has demanded a detailed account from the government on the mechanisms in place to ensure these devices are accurate and secure.

The issue came to the forefront during the hearing of a writ petition filed by Mr. Ajay Kumar Kashyap C, who was fined ₹10,000 for allegedly driving under the influence of alcohol. The single-judge bench of Justice B M Shyam Prasad, while issuing notice to the State and the Commissioner of Police (Traffic), made pointed oral observations highlighting the serious consequences faced by citizens based on the readings of these devices.

“We want to know from somebody what is the mechanism put in place to see that these breath analysers are properly monitored and they are tamper proof,” the Court stated at the outset, signaling its intent to delve deep into the procedural and technical safeguards surrounding the use of this critical evidentiary tool.

The Petitioner's Allegations: A Case Study in Procedural Lapses

The petition filed by Mr. Kashyap, represented by Advocates Medha Hegde and Vikram Simha, outlines a sequence of events that raises serious doubts about the procedure followed by the traffic police. According to the petitioner, his vehicle was stopped for a routine check. He claims to have been sober and willingly submitted to a breathalyser test.

The crux of his argument lies in the inconsistent results. He alleges that the first two attempts on the device showed a negative result, indicating no alcohol in his system. Unsatisfied, the police allegedly compelled him to blow into the device a third time, which then registered a positive result. This discrepancy, the petitioner contends, points to either a malfunctioning device or improper handling by the officers.

Further strengthening his plea, Mr. Kashyap claims the officers did not perform a calibration of the instrument in his presence before conducting the test—a standard procedural step to ensure accuracy. When he contested the positive reading and requested to be taken to a nearby government hospital for a definitive blood test, the police refused. Instead, they proceeded to issue a fine and seize his vehicle.

In an effort to vindicate himself, Mr. Kashyap independently underwent a medical examination at a private diagnostic center shortly after the incident. The resulting medical certificate, which he has submitted to the court, reportedly shows no traces of alcohol in his system. Despite this evidence, he alleges he is being "repeatedly called to the police station for inquiry," prompting the Court to order that "no precipitative action" be taken against him pending the next hearing on September 3.

Legal Scrutiny: Beyond a Single Case

The High Court’s intervention transcends the specifics of Mr. Kashyap's case, touching upon broader principles of evidence law, due process, and administrative accountability. The Court acknowledged the severe repercussions of a drunk driving charge, which includes a fine of ₹10,000 or six months' imprisonment for a first-time offense under the Motor Vehicles Act, 1988.

Justice Prasad underscored the gravity of the situation, noting, “There are serious consequences...petitioner perhaps may be justified in asserting that the breath analysers are prone to tampering, exposing the commuters to an unjustified allegation of drunk driving, leading to proceedings and consequences.”

This observation opens a Pandora's box of legal challenges. For a conviction to stand, the evidence must be reliable and obtained through fair procedure. The Court is essentially questioning the foundational reliability of breathalyser readings if the devices themselves are not subject to a rigorous, transparent, and verifiable system of maintenance and calibration.

The Court’s demand for a written submission on the existing protocols is a crucial step. “We want to see in writing on the mechanism that is in place by the police department to ensure that these analysers are checked regularly for ensuring there is no tampering,” the bench declared. This puts the onus directly on the state to prove that its equipment and procedures can withstand judicial scrutiny.

Implications for Legal Practice and Law Enforcement

The outcome of this case could set a significant precedent for motor vehicle and criminal law practitioners.

• Challenging Evidence: Defence lawyers will be closely watching for the standards the Court sets. If the police department's submitted mechanism is found wanting, it could provide a strong basis for challenging the admissibility of breathalyser evidence in numerous pending and future drunk driving cases.

• Right to a Confirmatory Test: The police's refusal to facilitate a blood test, a far more accurate measure of Blood Alcohol Concentration (BAC), is a critical point. The Court’s final ruling may clarify the rights of an accused individual to demand such a test, especially when the initial screening result from a portable device is disputed. This could be interpreted as a violation of the right to a fair investigation.

• Procedural Mandates: The case may lead to judicially-mandated Standard Operating Procedures (SOPs) for traffic police. These could include mandatory pre-test calibration in the presence of the driver, documenting multiple readings, and establishing a clear protocol for handling requests for blood tests.

• Technological and Administrative Overhaul: The police department may be compelled to invest in newer, more reliable technology and create a robust, auditable trail for each device—from procurement and calibration history to field usage and maintenance records.

As the legal community awaits the state's response, this case serves as a vital check on the powers of law enforcement and the technology they employ. It reaffirms the principle that while the objective of curbing drunk driving is paramount, the methods used to achieve it must be unimpeachably fair, transparent, and compliant with the due process of law. The Court's inquiry aims to ensure that the instruments of justice are not themselves instruments of potential injustice.