Legal analysis: lawyers can collect evidence from witnesses, including physical evidence, documentary evidence and witness testimony. Article 43 of the Criminal Procedure Law: With the consent of witnesses or other relevant units and individuals, defense lawyers may collect materials related to the 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.
Legal basis: Article 43 of the Criminal Procedure Law of People's Republic of China (PRC), with the consent of witnesses or other relevant units and individuals, defense lawyers may 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.