This case addresses a conviction under the NDPS Act for the possession of 4 kg of opium, with the prosecution asserting that the accused, Mohan Lal, was apprehended carrying the ... illegal substance during patrol duty, as documented by witnesses including PW-1 and PW-4. Following a conviction and sentencing by the trial court, the accused contested the fairness of the investigation and procedural adherence, but the Punjab and Haryana High Court affirmed the conviction, prompting an appeal to the Supreme Court.