Lawyers can be changed three days before the trial. The parties only need to appear in court to go through the authorization procedures with the new lawyer. If the original lawyer's right of representation needs to be revoked, a letter of revocation of power of attorney must be submitted to the court at the same time. The defender's duty is to present materials and opinions on the basis of facts and law that criminal suspects and defendants are innocent, have minor crimes, or reduce or exempt their criminal liability, and safeguard the litigation rights and other legitimate rights and interests of criminal suspects and defendants. Legal purpose:
Article 58 of the "Civil Procedure Law of the People's Republic of China and the State" The parties and legal representatives may entrust one or two people as litigation agents. The following people can be entrusted as litigation agents: (1) Lawyers and grassroots legal service workers; (2) Close relatives or staff of the parties; (3) Relevant social organizations recommended by the communities, units and citizens where the parties live.