After recording the confession at the police station, I called the past few days to sign it, mainly to assist in the investigation, and at the same time to sign some supplementary materials, which may be one of the following circumstances.

1. If you need to supplement the previous confession, you should continue to supplement it and sign it.

2. If there is a lack of signature on the previous confession, it is necessary to make a new confession. However, the previous confession must be kept and filed together with the new confession.

3. Other evidential materials that need to be signed and confirmed.

Generally speaking, you should not be detained, because if you have evidence to detain, you generally don't need to call in advance, apply for a detention permit at home and arrest directly.

Extended data:

1. According to Article 117 of China's Criminal Procedure Law, "A criminal suspect who does not need to be arrested or detained may be summoned to a designated place or residence or unit for interrogation, but the certificate of the people's procuratorate or the public security organ shall be produced." The purpose of summoning is to ensure that criminal proceedings are carried out in a planned way and cases are handled in a timely manner, and legal litigation documents-summoning cards must be used for summoning.

2. Paragraph 2 of Article 117 of the Criminal Procedure Law of People's Republic of China (PRC) stipulates that the time limit for summoning or compulsory summoning 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.

References:

Baidu Encyclopedia-People's Republic of China (PRC) and Public Security Administration Punishment Law