Legal basis: Criminal Procedure Law of People's Republic of China (PRC).
Article 40 A defender shall promptly inform the public security organ and the people's procuratorate of the evidence that the criminal suspect is not at the scene of the crime, has not reached the age of criminal responsibility, and belongs to a mental patient who is not criminally responsible according to law.
Article 41 With the consent of witnesses or other relevant units and individuals, defense lawyers may collect materials related to this case from them, or apply to the people's procuratorate or the people's court to collect and obtain evidence, or apply to the people's court to notify witnesses to testify in court.