Being taken away by the police to assist in the investigation will usually close the case within 24 hours and inform the family members. If it is only to assist in the investigation and there is no illegal crime, it will take 24 hours, but the public security organs, such as the criminal police team, the economic investigation team and the drug squad, are basically criminal suspects. After 48 hours of investigation, most people were transferred to the detention center.

Legal basis:

Criminal Procedure Law of the People's Republic of China

Article 82 If it is necessary to summon a person who violates the administration of public security for investigation, he shall be summoned with a summons card with the approval of the person in charge of the case-handling department of the public security organ. The people's police may summon an offender found on the spot who violates the administration of public security orally after producing his work certificate, but it shall be indicated in the inquiry record.

The public security organ shall inform the summoned person of the reasons and basis for summoning. A person who refuses to accept a summons or evades it without justifiable reasons may be summoned by force.

Article 83 After being summoned, the public security organ shall promptly inquire and verify the person who violates the administration of public security, and the time for inquiry and verification shall not exceed eight hours. If the situation is complicated and the punishment of administrative detention can be applied according to the provisions of this law, the time for questioning and verification shall not exceed 24 hours.

The public security organ shall promptly notify the family members of the summoned person of the reason and place of the summons.

Article 84 The record of inquiry shall be submitted to the person being questioned for verification; Read aloud for those who can't read. If there are omissions or errors in the record, the interviewee can supplement or correct them. After the person questioned confirms that the transcript is correct, he shall sign or seal it, and the people's police who inquire shall also sign the transcript.

If the person being questioned requests to provide written materials on the matters being questioned, it shall be allowed; When necessary, the people's police may also ask the person being questioned to write by himself.

When questioning a person under the age of 16 who violates the administration of public security, he shall notify his parents or other guardians to be present.

Article 85 The people's police may inquire at the unit or residence of the infringed person or other witnesses. When necessary, they can also be notified to testify in public security organs.

Paragraph 2 of Article 117, the time limit for summons or compulsory summons shall not exceed 12 hours; If the case is particularly serious and complicated and detention or arrest measures are needed, the time limit for summoning or compulsory summoning shall not exceed 24 hours.

The basic rights of citizens during the investigation:

1. Personal dignity. The personal dignity of citizens is inviolable. It is forbidden to insult, slander, falsely accuse or frame citizens in any way.

2. Criticism and suggestions, complaints, accusations or exposures, and the right to compensation.

3. Political rights and freedoms.

5. Right to equality