How to investigate and collect evidence during the investigation phase? Investigation and evidence collection at the investigation stage: During the investigation stage, defense lawyers can investigat

How to investigate and collect evidence during the investigation phase? Investigation and evidence collection at the investigation stage: During the investigation stage, defense lawyers can investigate criminal suspects who are not at the crime scene, have not reached the age of criminal responsibility, and are mental patients who are not criminally responsible according to law, as well as related proceedings. Conduct investigation and evidence collection. 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 People's Court to collect and obtain evidence, or apply to the People's Court Notify witnesses to appear and testify. 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 the witnesses provided by the victim, the defense lawyer may collect materials related to the case from them.