Under section 196A of the Criminal Law (Codification and Reform) Act, where two or more persons commit a crime in association and each possesses the requisite mens rea (whether intention, knowledge, or realization of real risk), they may be convicted as co-perpetrators, and the conduct of the actual perpetrator is deemed to be the conduct of every co-perpetrator, whether or not their conduct directly contributed to the commission of the crime. The defence of compulsion under section 243 requires proof of actual threats of death, serious bodily harm or financial loss that are imminent or have begun, that the accused could not escape, and that the accused's conduct did no more harm than necessary to avert the threat. Mere assertion of compulsion without evidence of threats, particularly where the accused had opportunity to withdraw, voluntarily participated in planning and execution, and was motivated by greed, will not establish the defence.