Legal analysis: lawyers need the signature of their families. Relatives must be close relatives, and the scope of close relatives in the criminal procedure law includes husband and wife, parents, children, brothers and sisters. Who entrusts who signs. A lawyer refers to a practitioner who has passed the national judicial examination, obtained a lawyer's practice certificate according to law, accepted the entrustment or designation, and provided legal services to the parties. According to the nature of work, lawyers can be divided into full-time lawyers and part-time lawyers, according to the scope of business, lawyers can be divided into civil lawyers, criminal lawyers and administrative lawyers, according to the client and work status, lawyers can be divided into social lawyers, corporate lawyers and public lawyers. Lawyer's business is mainly divided into litigation business and non-litigation business.
Legal basis: Article 93 of the Criminal Procedure Law of People's Republic of China (PRC). When arresting a person, the public security organ must produce an arrest warrant. After the arrest, the arrested person shall be immediately sent to the detention center for custody. Unless it is impossible to notify, the family of the arrested person shall be notified within 24 hours after the arrest.