1. You can know the type of evidence being verified. The Criminal Procedure Law does not clearly stipulate the types of evidence that defense lawyers can know and verify from criminal suspects and defendants, but personally, from the perspective of jurisprudence and legislative intent, defense lawyers should be able to know and verify the eight types of evidence stipulated in Article 48 of the Criminal Procedure Law, including both objective evidence and verbal evidence. Specifically: (1) physical evidence; (2) Documentary evidence; (3) Testimony of witnesses; (4) the victim's statement; (5) confessions and excuses of criminal suspects and defendants; (6) Appraisal opinions; (7) Records of the inquest, inspection, appraisal, investigation and experiment; (8) Audio-visual materials and electronic data.
You can know the scope of evidence to be verified. The Criminal Procedure Law also does not stipulate the scope of evidence that defense lawyers can learn and verify from criminal suspects and defendants, but in theory, defense lawyers should be able to learn and verify all the case files from criminal suspects and defendants. Because only in this way can the defense lawyer fully, timely and accurately understand the facts and evidence of the whole case. Otherwise, defense lawyers will not be able to further investigate and verify the questionable evidence materials, and put forward corresponding defense opinions or adjust defense ideas and strategies in time.
3. You can know how to verify the evidence. Because the provisions of the Criminal Procedure Law on the verification of evidence by defense lawyers to criminal suspects and defendants are too principled and not operable, in practice, some defense lawyers have different ways and practices to verify evidence from criminal suspects and defendants in custody.