According to Article 170 of the Criminal Procedure Law, when examining a case, the people's procuratorate must find out the following contents: 1, whether the facts and circumstances of the crime are clear, whether the evidence is true and sufficient, and whether the nature and charges of the crime are correctly identified. Finding out the facts and circumstances of the crime is the premise of correct conviction and sentencing, and finding out whether the evidence is true and sufficient is the basis and basis of correct conviction and sentencing. On the basis of finding out the facts of the crime and obtaining reliable and sufficient evidence, we should determine the nature of the crime and whether the crime is appropriate. The nature of the crime is closely related to the accusation. If we only identify the nature of the crime, but not the specific charges, it will be difficult to determine the nature. Because in crimes of the same nature, the law stipulates several crimes. It can be seen that the review of the nature of the crime and the review of the specific charges should be carried out at the same time. 2, there is no omission of crimes and other people who should be investigated for criminal responsibility. The people's procuratorate shall investigate crimes objectively and comprehensively. Therefore, when examining and prosecuting, we should pay attention to examining whether there are any criminal acts that omit criminal suspects and other persons who should be investigated for criminal responsibility. In order to find out all the criminal facts of the case, it is necessary to find out all the crimes of the criminal suspect and catch all the perpetrators of the same crime. 3, whether it belongs to the situation should not be investigated for criminal responsibility. Protecting innocent people from criminal investigation is one of the duties of the people's procuratorate. Therefore, when examining a case, the people's procuratorate must find out whether the suspect should not be investigated for criminal responsibility. Article 15 of the Criminal Procedure Law clearly stipulates the circumstances in which criminal responsibility should not be investigated.