1. A co-accused who testifies in his own defence while implicating other accused persons is not an accomplice witness as defined in s 195 of the Criminal Code and s 267 of the Criminal Procedure and Evidence Act, but is an actual perpetrator whose evidence, while admissible against co-accused, should be treated with caution to guard against false incrimination. 2. Physical possession is not an essential element of the offence of dealing in dangerous drugs under s 157(1)(a) of the Criminal Law (Codification and Reform) Act, although possession may complement proof of dealing. 3. "Dealing in" dangerous drugs under s 155 of the Criminal Law (Codification and Reform) Act is broadly defined to include performing any act, whether as principal, agent, carrier, messenger or otherwise, in connection with delivery, collection, importation, exportation, trans-shipment, supply, administration, manufacture, cultivation, procurement or transmission of such drugs. 4. Circumstantial evidence may be sufficient to establish guilt for dealing in dangerous drugs where the evidence, considered cumulatively, permits an inference of participation in importation, false declaration, transportation and communication in relation to the drug consignment, particularly in organized crime contexts.