1. Under normal circumstances, after the police report the case, the investigation will be launched after the case is filed, and the evidence will be fixed, such as making a record for the parties; It is also possible that after reporting the case, the police station cannot immediately judge whether it meets the conditions for filing a case, or it is possible to conduct a preliminary investigation and make a record. After reporting the case, the police station definitely does not meet the conditions for filing the case and will not accept it, so it will not be recorded;
2. Reports can be made in written or oral form. If it is an oral report, the receptionist shall make a written record, which shall be signed or sealed by the informant after being read out correctly. The people's court, the people's procuratorate or the public security organ shall, within the jurisdiction, examine the report materials in a timely manner, and if they think that there are criminal facts that need to be investigated for criminal responsibility, they shall file a case; If it is considered that there is no criminal fact, or the criminal fact is obviously minor, it is not necessary to pursue criminal responsibility, and the case will not be filed.
Legal basis: Article 124 of the Criminal Procedure Law of People's Republic of China (PRC).
Investigators can question the witness on the spot, or they can go to the unit, residence or place where the witness is presented. When necessary, the witness may be notified to testify in a people's procuratorate or a public security organ. When questioning witnesses on the spot, they should show their work certificates, and when questioning witnesses at their units, residences or places proposed by witnesses, they should show their certificates from people's procuratorates or public security organs.
The questioning of witnesses should be conducted separately.
Article 109
When a public security organ or a people's procuratorate discovers a criminal fact or a criminal suspect, it shall file a case for investigation within its jurisdiction.
Article 110
Any unit or individual who discovers criminal facts or suspects has the right and obligation to report to the public security organ, the people's procuratorate or the people's court.
Victims have the right to report and accuse criminal facts or criminal suspects who infringe their personal and property rights to public security organs, people's procuratorates or people's courts.
Public security organs, people's procuratorates or people's courts shall accept reports, complaints and reports. If it does not belong to its own jurisdiction, it shall be transferred to the competent authority for handling, and the informant, complainant and informant shall be notified; For those who are not under their jurisdiction and must take emergency measures, they should take emergency measures first and then transfer them to the competent department.
Where a criminal surrenders himself to a public security organ, a people's procuratorate or a people's court, the provisions of the third paragraph shall apply.