Sometimes the case is not closed after taking photos, because it takes a long time to sort out the closing materials, and the missing materials need to be supplemented. The witness transcripts are not perfect and need to be checked one by one. In order to successfully close the case and arrest the suspect, it is necessary to consult the arrest department of the procuratorate. Only when the materials are completed can the procuratorate submit the materials for arresting the criminal suspect, and the case will be completely closed.

When closing the case, if the evidence is registered and preserved in advance, the name, quantity and characteristics of the evidence shall be jointly registered with the evidence holder or witness, and a list of the evidence registered and preserved in advance shall be issued. When necessary, photographs shall be taken of the registered and preserved evidence. The list of evidence registered and preserved in advance shall be signed by the people's police handling the case and the evidence holder or witness. If the evidence holder refuses to sign, the people's police handling the case shall indicate it on the list of evidence registered and preserved in advance. The list of evidence registered and preserved in advance is in duplicate, one with a copy and one for the parties.