Legal analysis: After calling the police, the police will first ask the informant, make a record, and the informant will sign for confirmation. At the same time, the informant will also make a registration form, and the informant can ask the public security organ to issue an alarm receipt. According to the evidence provided by the informant and collected by the public security organ, if the suspect is suspected of constituting a crime, it will file a case for investigation.

Legal basis: Decision of the Ministry of Public Security on Amending the Provisions of Public Security Organs on Handling Criminal Cases.

Article 169 A public security organ shall immediately accept a citizen's report, complaint or report or the surrender of a criminal suspect, inquire about the situation and make a record. After verification, it shall be signed and fingerprinted by the distractor, prosecutor, accuser, informant and surrender. When necessary, the process should be recorded and videotaped.

Article 175 If a case is found to have criminal facts but is not under its jurisdiction after examination, it shall be immediately reported to the person in charge of the public security organ at or above the county level for approval, and a notice of transferring the case shall be made, which shall be transferred to the organ with jurisdiction for handling within 24 hours, and the sender, informant, accuser and informant shall be informed. For those who are not under their jurisdiction and must take emergency measures, take emergency measures first, then go through the formalities and transfer them to the competent department. For matters that do not fall within the scope of duties of public security organs, if they can judge on the spot when receiving a report, they shall immediately verbally inform the abductor, informant, accuser and informant to report to other competent authorities. Cases that are repeatedly reported, being handled or completed shall be explained to the abductor, informer, accuser and informer, and registration shall be stopped unless there are new facts or evidence.