The State shall staunchly act in accordance with the strength and wisdom of the masses in the handling of criminal cases and shall thoroughly defend the interests of the masses. Article 4 (Principle of Preventing Crime) The State shall strengthen law-abiding culture and legal control among the citizens to prevent crimes in advance. Article 5 (Principle of Guarantee of Totality, Scientific Accuracy, Objectivity, Caution, and Fairness) In handling of criminal cases, the State shall guarantee totality, scientific accuracy, objectivity, caution and fairness. Article 6 (Principle of Guarantee of Human Rights) The State shall thoroughly guarantee human rights in the handling of criminal cases. Article 7 (Principle of Use of Korean in Handling Criminal Cases) The State shall handle cases in our language. A person who does not know Korean shall have a translator. Foreign nationals may write documents related to a criminal case in their language. Article 8 (Principle of Adherence to Principles, Processes and Methods Provided for by Law) The State shall follow the principles, processes and methods provided in this law in the handling of criminal cases. CHAPTER II. GENERAL REGULATIONS SECTION I. PARTIES TO A CRIMINAL ACTION Article 9 (Parties to a Criminal Action) Parties to a criminal action are the people in charge of the criminal action and participants to the criminal action. The people in charge of the criminal action are the detective, investigator, prosecutor, judge, and the participants to the criminal action are people who are involved in the handling of the criminal action such as lawyers, judicial clerks, scribes, witnesses, expert witnesses, claimants for compensation, interpreters, translators, interpreters, observers, guarantors, and the accused. Article 10 (Person in Charge of Investigation) Investigation shall be done by the professional detective of the legal institution concerned. According to need, workers with the authority to investigate may also investigate.