Lawyers in criminal cases can investigate and collect evidence. According to the law, with the consent of witnesses or other relevant units and individuals, defense lawyers can collect materials related to this case from them, apply to the people's procuratorate or the people's court for collecting and obtaining evidence, or apply to the people's court for notifying witnesses to testify in court.
Legal objectivity:
Article 41 of the Criminal Procedure Law of People's Republic of China (PRC): Defenders have the right to apply to the People's Procuratorate and the People's Court for retrieval if they think that the evidence materials collected by the public security organs and people's procuratorates in the process of investigation, examination and prosecution to prove the innocence of the criminal suspect or defendant or the light crime have not been submitted. Article 43 of the Criminal Procedure Law of People's Republic of China (PRC) * * * Defence lawyers may, with the consent of witnesses or other relevant units and individuals, collect materials related to the case from them, 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.