Legal analysis: the appeal of criminal cases needs lawyers. With the improvement of citizens' legal consciousness, the role of professional legal person is becoming more and more important. Especially in criminal cases, because personal freedom is involved, the role of lawyers is more critical. Usually, after a lawyer intervenes in a case, he will start with the following matters concerning the immediate interests of the criminal suspect: 1, meet the criminal suspect, find out the evidence clues of his guilt or innocence, collect evidence, and prepare the relevant application materials for changing compulsory measures. 2. Make an appointment with the judge, consult and copy the defendant's case file. 3. Exchange opinions with the defendant on the defense opinions initially formed by lawyers, and inform the defendant of the trial procedures and matters needing attention. 4. Make a plea of innocence or light crime according to the actual situation of the case, and try to win the approval of the judge for the defense opinion.
Legal basis: Article 33 of the Criminal Procedure Law of People's Republic of China (PRC). In addition to exercising the right of defense, criminal suspects and defendants may also entrust one or two people as defenders. The following persons may be entrusted as defenders: (1) lawyers; (2) A person recommended by a people's organization or the unit to which the criminal suspect or defendant belongs; (3) Guardians, relatives and friends of criminal suspects and defendants. A person who has been sentenced to punishment according to law or deprived of or restricted personal freedom shall not act as a defender. A person who has been dismissed from public office or has his lawyer's or notary's practice certificate revoked may not act as a defender, except the guardian or near relative of the criminal suspect or defendant.