CRIMINAL LAW: Dangerous Drugs Act 1952 - Section 39B(1)(a) - Trafficking in dangerous drugs - Sequence of events - Location of drugs - Whether there were conflicting testimonies - Whether appellant's defence considered - Whether non-production of material witness gave rise to adverse inference under s. 114(g) of Evidence Act 1950 - Whether exhibits tendered were in relation to charge - Whether there was a mix up of exhibits - Whether storekeeper should have been called as witness

EVIDENCE: Adverse inference - Failure to call material witness - Trafficking in dangerous drugs - Key witness - Failure to tender witness statement under s. 112 Criminal Procedure Code - Whether crippled prosecution's case - Whether non-production of witness gave rise to adverse inference - Evidence Act 1950, s. 114(g)