Legal basis: Criminal Procedure Law of People's Republic of China (PRC).
Article 41 Defenders who believe that the evidence materials collected by public security organs and people's procuratorates to prove the innocence or minor crimes of criminal suspects and defendants have not been submitted have the right to apply to the people's procuratorates and people's courts for retrieval.
Article 43 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.
With the permission of the people's procuratorate or the people's court, and with the consent of the victim or his close relatives or witnesses provided by the victim, the defense lawyer may collect materials related to the case from them.