In criminal law, the “elements of a crime” are the specific factual components the prosecution must prove beyond reasonable doubt for an accused to be convicted of a particular offence. They commonly include the prohibited conduct or circumstance (actus reus), the required mental state (mens rea), and, where relevant, the absence of a valid defence. The elements of individual offences are usually set out in statute (for example, Theft Act 1968 in England and Wales, comparable legislation in Northern Ireland, the Criminal Justice (Theft and Fraud Offences) Act 2001 in Ireland, and Scottish statutes), and interpreted and refined by case law in each jurisdiction. Across England and Wales, Scotland, Northern Ireland and Ireland, the concept is broadly consistent, though Scots criminal law uses distinct doctrinal terminology and some offences are framed differently. In practice, identifying the precise elements governs case preparation, charging decisions, directions to the jury or sheriff, and submissions of no case to answer. Failure to prove any single element will ordinarily result in acquittal.