Check whether a person is detained.
Because the police station should inform the family members of the parties when arresting people, and if there is an infringed person, you can also ask the infringed person. If the public security organ considers it necessary to arrest the detained person, it will submit it to the people's procuratorate for examination and approval. If the people's procuratorate does not approve the arrest, the public security organ shall immediately release it after receiving the notice and promptly notify the people's procuratorate to execute it.
If you want to inquire whether a person has a criminal record, you can go to the public security organ for consultation. Criminal record generally refers to the record of a person's past crimes or criminal acts, also known as the criminal record system. In our country's law, it generally refers to the archival records of criminal records, which are generally stored in the public security department.