Criminal Law is the body of law that defines criminal offenses, regulates the apprehension, charging, and trial of suspected offenders, and fixes punishment for convicted persons. Generally, two elements are required to find a person guilty of a crime, an overt criminal act and criminal intent. The requirement of an overt act is fulfilled when the defendant purposely, knowingly, or recklessly does something prohibited by law. Criminal intent must be formed before the act and must unite with the act; however, it does not have to exist for any given length of time before the act. An omission, or failure to act, may constitute a criminal act if there is a duty to act.