Prinsip undang-undang ini telahpun diputuskan oleh Mahkamah Rayuan dalam kes PP v. Poh Chee Huong [2016] 10 CLJ 123 melalui penghakiman yang disampaikan oleh Idrus Harun JCA (pada ketika itu) seperti yang berikut: “[24] The learned judge had expressly stated that she had to exercise caution when dealing with PW5’s evidence as she was the accused’s wife. However, the fact remains that we cannot ignore her evidence completely when she insisted that she was with the accused when the latter was arrested and that the Dunhill cigarette packet was found on the dashboard of the car. We bear in mind that PW5 was the prosecution’s witness. The prosecution had taken the risk when it chose to call PW5 to testify on its behalf. Her evidence had obviously contradicted the evidence of the other prosecution’s material witnesses at least in two fundamental aspects. Firstly, her testimony relating to the drugs found in the car boot which according to her belonged to Ah Lam had contradicted with the evidence of other prosecution’s witnesses that the drugs belonged to the accused. Secondly, her evidence that the Dunhill cigarette packet was found on the dashboard of the car had run counter to the evidence of PW3 that it was found in the pocket of the accused’s trousers. There was no impeachment of PW5’s credit at the earliest opportunity. Thus, her version remained on record as the prosecution’s evidence which in the result led to two diametrically opposed versions in the prosecution’s case. In a situation where the prosecution’s evidence admits of two or more inferences, one of which is in the accused’s favour, it is the duty of this court to draw the inference that is favourable to the accused (PP v. Mohd Radzi Abu Bakar [2006] 1 CLJ 457 at p. 466). It would be wrong for this court to completely disregard PW5’s evidence purely on the basis that she is an interested witness for it is now obvious that such witness is, in law, a competent witness. Neither could we, on the other hand, make light of the fact that there were contradictions in the prosecution’s case.”. [Penekanan ditambah]