Under what circumstances do police usually locate mobile phones?

In cases that seriously endanger public order, the police will locate the mobile phone.

Positioning mobile phone is a technical means, and it must be approved by the Municipal Public Security Bureau before it can be used. Mobile phone location refers to the technology or service that obtains the location information of mobile phone or end user through specific location technology, and marks the location of the located object on the electronic map. There are two kinds of positioning technologies, one is based on GPS, and the other is based on the positioning of base stations in mobile operating networks. The positioning method based on GPS is to use the GPS positioning module on the mobile phone to send its own position signal to the positioning background to realize the positioning of the mobile phone. Base station location is to determine the location of mobile phone by measuring the distance between base station and mobile phone, but the accuracy depends largely on the distribution of base stations and the size of coverage area, and the error will exceed one kilometer.

After the public security organ files a case, the materials obtained through technical investigation measures can only be used for criminal investigation, prosecution and trial, and may not be used for other purposes. In order to find out the case, if necessary, the relevant personnel may conceal their identity and conduct an investigation upon the decision of the person in charge of the public security organ. However, it is not allowed to induce others to commit crimes, and it is not allowed to use methods that may endanger public safety or cause serious personal danger. If the criminal suspect who should be arrested is at large, the public security organ may issue a wanted order and take effective measures to pursue and bring him to justice. Public security organs at all levels can directly issue wanted orders within their respective jurisdictions; Beyond the scope of this jurisdiction, it shall be reported to the higher authorities that have the right to decide to publish it. The period of investigation and detention of a criminal suspect after his arrest shall not exceed two months. If the case is complicated and cannot be concluded at the expiration of the time limit, it may be extended for one month with the approval of the people's procuratorate at the next higher level.

legal ground

Article 115 of the Criminal Procedure Law of People's Republic of China (PRC) * * * The public security organs investigate criminal cases that have been put on file, and collect and obtain evidence of the criminal suspect's guilt or innocence, and the crime is light or heavy. An active criminal or a major suspect may be detained in advance according to law, and a criminal suspect who meets the conditions for arrest shall be arrested according to law.