The legal opinion "Provisions on the Procedures for Handling Criminal Cases by Public Security Organs" deals with the reporting procedures as follows: Article 166: The public security organs shall immediately accept the abduction, reporting, accusation and report of citizens or the voluntary surrender of criminal suspects, inquire about the situation and make a record. After verification, the abductor, informant, accuser and surrender shall sign and press the fingerprint. When necessary, audio or video recordings shall be made. Article 171 The public security organ shall promptly examine the cases accepted or the criminal clues discovered. If the facts or clues of the case are unknown during the review, a preliminary investigation may be conducted with the approval of the person in charge of the case-handling department when necessary. During the initial investigation, the public security organ may, in accordance with the relevant laws and regulations, take measures that do not restrict the personal and property rights of the investigated object, such as inquiry, inquiry, inspection, appraisal and obtaining evidence materials. Article 175 After accepting a case, the public security organ shall, after examination, consider that the criminal facts that need to be investigated for criminal responsibility belong to its own jurisdiction, and file a case with the approval of the person in charge of the public security organ at or above the county level; If it is considered that there are no criminal facts, or the criminal facts are obviously minor and need not be investigated for criminal responsibility, or there are other circumstances in which criminal responsibility is not investigated according to law, the case shall not be filed with the approval of the person in charge of the public security organ at or above the county level. According to the above provisions, if a public security organ reports a case to a close relative of a missing person, it must go through a review to determine whether to file a case and the corresponding investigation measures according to the time, reasons, activities and performance before the disappearance. As long as people haven't found it, they will continue to look for it through various channels. If the whereabouts of the missing person have been unknown for four years, the interested party shall declare the missing person dead, and after the publicity period, the recommender shall cancel the account at the Public Security Bureau. Declaring life refers to the legal rule that a natural person leaves his domicile, his whereabouts are unknown, reaches the statutory time limit, and is declared dead by the people upon the application of an interested party. Compared with the design purpose of the rule of declaring missing, declaring dead mainly solves the state of the whole civil legal relationship of the missing person, and declaring missing mainly solves the property management of the missing person. Therefore, declaring death focuses on protecting the interests of the stakeholders of the declared dead, while declaring missing focuses on protecting the interests of the missing.