This accused was prosecuted before me upon a single count of trafficking in dangerous drugs, to wit, 170.3 grammes of heroin, in contravention of s.39B(1)(a) of the Dangerous Drugs Act, 1952 (Revised 1980) ("the Act"). Specifically, the charge was expressed in the following terms:

"That you, Neoh Wan Kee @ Neoh Guan Kee (m), on October 15, 1981, at about 4.25 p.m. at Jalan Tun Syed Sheh Barakhbah, in the District of Georgetown, in the State of Penang, did on your own behalf traffic in dangerous drugs, to wit, 170.3 grammes of heroin, in contravention of section 39B(1)(a) of the Dangerous Drugs Act, 1952,(Revised 1980), and that you have thereby committed an offence punishable under section 39B(2) of the same Act."

According to the prosecution, one Mr. David Richardson (P.W.2), who had been engaged in criminal investigation work for the United States Government for the last eighteen years and was, at all material times, attached to the Drug Enforcement Administration, Cincinati, Ohio, came to Penang in October, 1981, on a temporary duty assignment.

On arrival in Penang, he spent much time in Penang Street and Chulia Street where he was asked by several persons if h