Two, lawyers must abide by the special provisions of criminal procedure in investigating criminal evidence, and must obtain the consent of the relevant units and individuals or the approval of the people's court before investigation and evidence collection.
Third, according to the requirements of the Lawyers Law and lawyers' professional ethics, lawyers' right to collect evidence in criminal investigation focuses on collecting evidence beneficial to the defendant. Four, the evidence obtained by the lawyer's investigation can not be directly used as the basis for the court to finalize the case, and can only be used as evidence after investigation and verification by the court.