The burden or requirement of proof in NSW is always on the Prosecution to prove the charges beyond a reasonable doubt. That burden never changes, and the accused has no obligation to prove any fact or issue in the criminal hearing. A crucial part of Sydney's criminal law justice system is the presumption of innocence – that means that when a person is charged with a criminal offence, he/she is presumed innocent until the Prosecution has proved the case or their guilt beyond a reasonable doubt.