​A former Assistant Narcotics Officer Two, Muhammad Ali Iskandar bin Mustapha was charged before the Honourable Senior Magistrate Hajah Azrimah binti Haji Abdul Rahman on 26th December 2024, for five counts of Section 12B of the Prevention of Corruption Act, Chapter 131 and two charges taken into consideration. This section carries a penalty of a fine of $30,000 and 7 years imprisonment. Muhammad Ali Iskandar pleaded guilty to all the charges preferred against him. The Honourable Senior Magistrate subsequently imposed an overall custodial sentence of 2 years and 8 months' imprisonment.

The Prosecution subsequently filed an appeal against the sentence on the basis that the sentence was manifestly inadequate. The appeal was heard before The Honourable Judicial Commissioner of the Supreme Court. In the appeal, the Prosecution invited the Court to reconsider the weight accorded to the aggravating features of the case. These included the degree of abuse of his position as an Assistant Narcotics Officer Two at the Narcotics Control Bureau, the frequency of the commission of the misconduct, the nature of information he disclosed, and the overarching effect of his misconduct on the Narcotics Control Bureau - the sole institution entrusted to eradicate the use, supply and trafficking of illicit drugs in Brunei Darussalam. In handing down his judgement on 2nd October 2025, The Honourable Judicial Commissioner remarked that the aggravating factors present in the case led the court to take on the view that the starting points for the offences committed by Muhammad Ali Iskandar should be nearer to the maximum prescribed penalty for the offence under section 12B, which is imprisonment sentence of 7 years.

He further highlighted that among the most aggravating features of this case are Muhammad Ali Iskandar's abuse of his position as a Narcotics Officer in order to obtain personal benefits, and the overall effect of his misconduct on the public trust and their confidence in the integrity of the Narcotics Control Bureau.