Legal analysis:
The organ that exercises legal supervision over criminal proceedings in accordance with the law is: the people's procuratorate. The people's procuratorate is the legal supervisory organ of the state, and the implementation of legal supervision of criminal proceedings is of great significance in ensuring that crimes are punished accurately and in a timely manner, guaranteeing that innocent people are not subjected to criminal prosecution, respecting and safeguarding human rights, and advancing judicial justice. Supervision of the filing of criminal cases. The task of supervising the filing of criminal cases is to ensure that cases are filed in accordance with the law, and to prevent cases from being filed in violation of the law. In the filing stage, such as the People's Procuratorate that the public security organs of the public security organs of the investigation and not filed, the right to request the public security organs to explain the reasons for not filing, that the reasons for not filing can not be justified, should notify the public security organs to file a public security organs should be informed of the case, the public security organs should be notified to file a case. Supervision of investigations. The people's procuratorate's supervision of investigative activities is realized mainly through the examination and approval of arrests and the examination of prosecutions. If the people's procuratorate approves an arrest, the public security organ shall promptly notify the people's procuratorate of the execution of the arrest. If it is found that the investigative activities are in violation of the law, the public security organs are notified to rectify the situation, and the public security organs are required to notify the procuratorate of the situation. If a suspect is found to have been arrested but not yet apprehended, the procuratorate suggests that the public security organ request an arrest; if the public security organ's reasons for requesting an arrest are not substantiated, the procuratorate will directly make a decision on the arrest, which will be sent to the public security organ for execution. Trial supervision. The procuratorate's supervision of trials is divided into supervision of court proceedings; supervision of first-instance decisions; supervision of decisions that go into effect; supervision of death penalty reviews; and supervision of special procedures. Supervision of executions. Supervision of the execution of the death penalty on the spot; supervision of the execution outside prison; supervision of the commutation of sentence, parole; supervision of the lawfulness of the activities of the executing authorities in the execution of the penalty.
Legal basis: "Chinese people's **** and the State Criminal Procedure Law" Article 3 of the investigation of criminal cases, detention, arrest, pre-trial, by the public security organs. Prosecution, approval of arrests, investigation of cases directly accepted by the procuratorial organs, and the bringing of public prosecutions shall be the responsibility of the people's procuratorates. Trials are the responsibility of the people's courts. No other organ, organization or individual has the right to exercise these powers except as specifically provided by law.