This document provides an overview of the key concepts of criminal liability under Malaysian law, including the definition of a crime, elements of a crime (actus reus and mens rea), and discussions of actus reus. It defines a crime and notes that every crime has its own specific definition. It explains that for criminal liability to exist, there must generally be an unlawful act (actus reus) accompanied by a blameworthy state of mind (mens rea). The document then discusses actus reus in depth, including that it can involve an act, omission, or circumstance, and must be voluntary. It provides examples of when an omission can form the basis of criminal liability and discusses the defense of automat