Legal basis: Article 11 of the Regulations on Legal Aid in Criminal Procedure, citizens can apply for legal aid from legal aid institutions: (1) Since the criminal suspect was interrogated for the first time by the investigation organ or took compulsory measures, he failed to hire a lawyer due to financial difficulties; (2) The victim of a public prosecution case and his legal representative or close relatives have not entrusted an agent ad litem due to financial difficulties since the date when the case was transferred for examination and prosecution; (three) since the case of private prosecution was accepted by the people's court, the private prosecutor and his legal representative have not entrusted an agent ad litem due to financial difficulties.