Legal analysis: to the public security organs to understand the suspect's suspected crime and the case, and put forward opinions; with the suspect to meet and correspond with the suspect, to understand the case to the suspect; for the suspect to provide legal assistance, representation of the complaint, accusation; for the suspect to apply for a change of coercive measures.
Legal basis: "Public Security Organs Handling Criminal Cases Procedural Provisions" Article 42 The public security organs shall guarantee the defense lawyers to engage in the following practice activities in the investigation stage according to the law:
(1) to the public security organs to learn about the suspects suspected of the crimes and the case, and to put forward their opinions;
(2) to meet with the suspects and correspond with them, to
(3) providing legal assistance to criminal suspects and representing them in complaints and accusations;
(4) applying for changes in compulsory measures for criminal suspects.