Legal basis: Article 37 of the Criminal Procedure Law of People's Republic of China (PRC), defenders put forward materials and opinions on the innocence, light crime or reduction or exemption of criminal responsibility of criminal suspects and defendants according to facts and laws, so as to safeguard the litigation rights and other legitimate rights and interests of criminal suspects and defendants.
Article 38 A defense lawyer may provide legal aid to a criminal suspect during investigation. Acting as an agent for complaints and accusations; Apply for changing compulsory measures; Ask the investigation organ about the crimes and cases suspected by the criminal suspect, and put forward opinions.