The specific reasons are as follows:
1. In a public prosecution case, the parties decide whether to entrust a lawyer or not, but the criminal suspect or defendant who must entrust a defender according to the law must entrust a lawyer or apply for legal aid. If the criminal suspect or defendant is a mental patient who is blind, deaf, dumb or has not completely lost the ability to identify or control his own behavior, and has not entrusted a defender, the people's court, the people's procuratorate and the public security organ shall notify the legal aid institution to appoint a lawyer to defend him. If a criminal suspect or defendant may be sentenced to life imprisonment or death without entrusting a defender, the people's court, the people's procuratorate and the public security organ shall notify the legal aid institution to appoint a lawyer to defend him;
2. Only the lawyer hired by the defendant is called a defender, but in the case of criminal incidental civil compensation, an agent ad litem can be hired to request compensation, and at the same time, opinions can be expressed on the criminal part to safeguard the legitimate rights and interests of the victim. The people's court shall, within three days from the date of accepting a case of private prosecution, inform the private prosecutor and his legal representative, the parties to an incidental civil action and his legal representative that they have the right to entrust an agent ad litem, and inform them that they can apply for legal aid if they are in financial difficulties.
legal ground
Article 35 of the Criminal Procedure Law of People's Republic of China (PRC), if the defendant fails to entrust a defender due to financial difficulties or other reasons, he and his close relatives may apply to the legal aid institution. To meet the conditions of legal aid, legal aid institutions shall appoint lawyers to defend them. If the criminal suspect or defendant is a mental patient who is blind, deaf, dumb or has not completely lost the ability to identify or control his own behavior, and has not entrusted a defender, the people's court, the people's procuratorate and the public security organ shall notify the legal aid institution to appoint a lawyer to defend him. If a criminal suspect or defendant may be sentenced to life imprisonment or death without entrusting a defender, the people's court, the people's procuratorate and the public security organ shall notify the legal aid institution to appoint a lawyer to defend him.