Under what circumstances will an investigation letter be sent?

Public security organs generally do not send text messages to inform the case, but they will take corresponding measures according to the handling procedures.

legal ground

Procedures for handling criminal cases by public security organs

Article 168 When accepting a case, a public security organ shall make a registration form for accepting the case and issue a receipt.

Article 175 After accepting a case, the public security organ shall, after examination, consider that the criminal facts that need to be investigated for criminal responsibility belong to its own jurisdiction, and file a case with the approval of the person in charge of the public security organ at or above the county level; If it is considered that there are no criminal facts, or the criminal facts are obviously minor and need not be investigated for criminal responsibility, or there are other circumstances in which criminal responsibility is not investigated according to law, the case shall not be filed with the approval of the person in charge of the public security organ at or above the county level. If a complainant decides not to file a case, the public security organ shall make a notice of not filing a case and serve it on the complainant within three days.

Procedures for handling administrative cases by public security organs

Article 47 The public security organ shall promptly accept cases in which the masses report, accuse, expose and transfer criminal suspects, as well as cases transferred by other administrative departments and judicial organs, make a case acceptance registration form, and make the following treatments respectively:

(a) the matters within the jurisdiction of the unit shall be investigated and handled in a timely manner.

(2) If it falls within the scope of duties of the public security organ, but it is not under the jurisdiction of the unit, it shall be transferred to the unit with jurisdiction for handling within 24 hours after acceptance, and the informant, complainant, informant, trafficked person and surrender person shall be informed.

(3) Inform reporters, accusers, informers, trafficked persons and surrenders in writing about matters not within the scope of duties of public security organs to report or surrender to other relevant competent authorities.

When accepting a case, the public security organ shall make a receipt in duplicate, one for the informant, the complainant, the informant and the sender, and one for the attached volume.

The provisions of the first paragraph shall apply to illegal acts discovered by public security organs and their people's police in their daily law enforcement duties.