Knowledge [49] The Appellant submits that his panic during the raid was consistent with normal human behaviour and did not establish knowledge. We agree that mere nervousness or surprise, without more, is insufficient. However, the learned High Court Judge did not rely solely on the Appellant’s reaction. [50] The critical factor was that the Appellant was able to lead the police directly to the drawer containing the drugs. Such specific knowledge of the exact location is a strong incriminating circumstance. When viewed together with the recovery of the drugs in his room, the inference of knowledge was irresistible. As consistently held, knowledge may be inferred from circumstantial evidence. The learned High Court Judge drew the inference logically and in accordance with established principles. [51] The Federal Court in Parlan Dadeh v PP [2009] 1 CLJ 717 explained that evidence of conduct is admissible under section 8 of the Evidence Act 1950 if it is influenced by a fact in issue. If unexplained, the inference remains unrebutted. In this appeal, the Appellant offered no satisfactory explanation for his conduct, particularly his ability to lead PW1 directly to the concealed drugs. His defence was essentially a bare denial. [52] Further guidance is found in Johar Mustapha v PP [2009] 6 CLJ 193, which adopted the reasoning in Warner v MPC [1969] 2 AC 256, that physical control of a container known to have contents constitutes possession of its contents. [53] The learned High Court Judge was entitled to infer knowledge from the Appellant’s deliberate act of retrieving the drugs from the drawer. This was not mere passive presence. The presumption under section 37(d) DDA 1952 was properly invoked once custody and control were established. [54] In Emmanuel Yaw Teiku v PP [2006] 3 CLJ 597, the Federal Court held that there is no mandatory requirement to invoke section 37(d) actual possession cum knowledge may be established from the totality of the evidence. In the present case, even without reliance on section 37(d) of the DDA, there was direct evidence of affirmative possession. The Appellant’s retrieval and surrender of the drugs is overwhelming evidence of conscious control. [55] His defence amounted to mere denial. As observed by the Federal Court in Raman Kunjiraman v PP [2014] 9 CLJ 915 where there is overwhelming evidence of custody and control, and the defence is bare denial, the conviction is safe.