The time for investigating witnesses to check evidence and record confessions is very fast, usually in an hour or two, and it is faster to collect fingerprints, but it also depends on the technical level of the collectors. It can be collected in a minute, and some may take half an hour.

If the suspect is investigated, the police may investigate the suspect.

According to the provisions of the Criminal Procedure Law of People's Republic of China (PRC) and the People's Police Law, the interrogation time for criminal cases shall not exceed 12 hours, for public security administrative cases, it shall not exceed 8 hours, and for those who apply detention punishment, it shall not exceed 24 hours. If it is interrogation, it can be detained for 48 hours, and other compulsory measures can be taken or released within the above time. If it is exceeded, it is illegal, and the parties concerned may report it to the discipline inspection department of the public security organ at a higher level or.