First, direct written (physical) verification. The defense lawyer may separately copy or extract the collected objective evidence, such as physical evidence (photos), documentary evidence, expert opinions, records of inquests, inspections, appraisals and investigation experiments, and submit them directly to the criminal suspect and defendant in written form for examination and verification. Audio-visual materials and electronic data collected in the volume should be understood and verified according to the evidence itself, such as whether the case-handling unit has converted QQ, WeChat chat records, mobile phone short messages, surveillance videos, recorded materials, etc. Into written form or into language materials, and so on. For audio-visual materials such as synchronous audio and video recordings of investigation and interrogation, which are not suitable for verification in the detention place, the defense lawyer may verify with the criminal suspect and defendant after watching.
The second is direct two-way verification. The defense lawyer can copy (pick out separately) or extract the relevant evidence materials of the criminal suspect and the defendant's own confession and defense, and then submit them directly to the criminal suspect and the defendant in writing for examination and verification. Both parties can ask questions and communicate with each other if they have doubts about the facts and evidence.
The third is indirect one-way verification. For the victim's statement, witness testimony and confession and defense of the co-accused criminal suspect and defendant, it is not appropriate to directly submit the above evidence materials to the criminal suspect and defendant for inspection and verification, but the defense lawyer can indirectly verify and identify the places that are still in doubt by asking questions, or select some relevant contents for the criminal suspect and defendant to listen to and check by reading aloud, which is safer.