What can a lawyer do after the murderer is arrested?

Legal analysis: lawyers can provide legal aid to criminal suspects in the investigation stage. Act as a defender at the stage of examination and prosecution. Its duty is to put forward materials and opinions to prove the criminal suspect's innocence, light crime or reduce or exempt his criminal responsibility according to facts and laws, and safeguard the legitimate rights and interests of the criminal suspect. At the trial stage, defense lawyers can investigate and collect evidence, meet the parties, and also consult, extract and copy all materials related to the case. Lawyers defend clients through evidence materials to safeguard the legitimate rights and interests of defendants. According to the relevant laws, lawyers can actually meet with criminal suspects. Even if criminal detention measures are taken in the investigation stage, family members can't visit and meet, and lawyers can meet the criminal suspects at the detention center after meeting the prescribed conditions to learn about the case. During the period, you can also apply for bail pending trial.

Legal basis: Criminal Procedure Law of People's Republic of China (PRC).

Thirty-sixth legal aid institutions can send lawyers on duty in people's courts, detention centers and other places. If the criminal suspect or defendant does not entrust a defender or the legal aid institution does not entrust a lawyer to defend him, the lawyer on duty will provide legal assistance to the criminal suspect or defendant, such as legal consultation, suggestions on procedure selection, application for changing compulsory measures, and suggestions on handling cases. The people's courts, people's procuratorates and detention centers shall inform the criminal suspects and defendants that they have the right to meet the lawyers on duty, and provide convenience for the criminal suspects and defendants to meet the lawyers on duty.

Article 39 A defense lawyer may meet and correspond with a criminal suspect or defendant in custody. Other defenders, with the permission of the people's courts and people's procuratorates, may also meet and correspond with criminal suspects and defendants in custody. If a defense lawyer holds a lawyer's practice certificate, a law firm's certificate, a power of attorney or a letter of legal aid to ask for a meeting with the criminal suspect or defendant in custody, the detention center shall arrange the meeting in time, which shall not exceed 48 hours at the latest. In criminal cases endangering national security and terrorist activities, defense lawyers should obtain permission from the investigation organ when meeting with the criminal suspect in custody during the investigation. The investigation organ shall notify the detention center of the above situation in advance. When a defense lawyer meets a criminal suspect or defendant in custody, he can understand the case and provide legal advice. From the date when the case is transferred for examination and prosecution, the relevant evidence may be verified with the criminal suspect or defendant. Defense lawyers are not monitored when meeting with criminal suspects and defendants. The provisions of the first, third and fourth paragraphs shall apply to the meetings and correspondence between defense lawyers and criminal suspects and defendants who are under surveillance.