Criminal investigation measures:
1, investigation measures. Such as on-site investigation, inspection, investigation and experiment, investigation and visit, appraisal, interrogation, inquiry and notification. ;
2. Commemorative measures. Such as tracking, intercepting, searching, waiting, wanted, etc. ;
3. Compulsory measures. Such as summons, detention, arrest, search, bail pending trial, residential surveillance, etc.
Criminal investigation procedure:
1, investigate behavior. In our country, investigation behavior includes not only the special investigation activities carried out by investigators according to law, but also the compulsory measures taken to prevent active criminals and criminal suspects from continuing to commit crimes, escape, destroy evidence or commit suicide. According to the provisions of the Criminal Procedure Law, China's investigation behavior system should include the following contents: interrogation of criminal suspects, questioning of witnesses, victims, inquest, inspection, search, seizure of physical evidence, documentary evidence, identification, wanted, summons, bail pending trial, residential surveillance, detention and arrest.
2. The investigation is over. The conclusion of investigation refers to a litigation activity in which the investigation organ thinks that the facts of the case have been ascertained and the evidence is sufficient to determine whether the suspect has committed a crime and whether criminal responsibility should be investigated, and decides to end the investigation, handle the case or put forward handling opinions according to law.
Legal basis: Article 3 of the Criminal Procedure Law of People's Republic of China (PRC).
Public security organs are responsible for the investigation, detention, execution of arrest and preliminary examination of criminal cases. The people's procuratorate shall be responsible for the prosecution, approval of arrest, investigation and prosecution of cases directly accepted by procuratorial organs. The people's court is responsible for the trial. Except as otherwise specified by law, no other organ, organization or individual has the right to exercise these powers. In criminal proceedings, the people's courts, people's procuratorates and public security organs must strictly abide by the relevant provisions of this Law and other laws.