What must be present in a criminal matter?

In a criminal matter, there must be a clear violation of a law that defines a criminal offense. This violation typically involves two key elements: actus reus (the guilty act) and mens rea (the guilty mind or intent). Additionally, there must be sufficient evidence to support the prosecution's case, as well as the presence of legal jurisdiction to adjudicate the matter. Lastly, the rights of the accused must be respected throughout the legal process.