Can I listen to voice calls on WeChat in criminal cases?

Legal analysis: Yes. If the public security organ files a case, it can be retrieved by means of technical investigation, because the storage space of the service provider will retain the corresponding time limit. However, the former problem can only be implemented after the public security bureau files a case and the other party is a suspect or suspect involved in the case and passes the corresponding examination and approval. Electronic monitoring and telephone monitoring are technical investigation measures. Technical investigation measures refer to measures such as record monitoring, whereabouts monitoring, communication monitoring and place monitoring implemented by the departments in charge of technical investigation of public security organs at or above the municipal level with districts. Technical investigation measures are applicable to criminal suspects, defendants and persons directly related to criminal activities. The public security organ may take necessary technical investigation measures against the fugitive criminal suspect or defendant who is wanted or has been approved or decided to arrest.

Legal basis: Criminal Procedure Law of People's Republic of China (PRC).

Article 151 The approval decision shall determine the types and applicable objects of technical investigation measures according to the needs of crime investigation. The approval decision is valid for three months from the date of issuance. Those who do not need to continue to take technical investigation measures shall be lifted in time; For complex and difficult cases, if technical investigation measures need to be taken after the expiration of the time limit, the validity period may be extended after approval, and each time shall not exceed three months.

Article 152 Technical investigation measures must be taken in strict accordance with the types, applicable objects and time limits of approved measures. Investigators should keep confidential the state secrets, business secrets and personal privacy they know in the process of taking technical investigation measures; Materials irrelevant to the case obtained through technical investigation must be destroyed in time. The materials obtained by technical investigation measures can only be used for investigation, prosecution and trial of crimes, and shall not be used for other purposes. The public security organs shall take technical investigation measures according to law, and the relevant units and individuals shall cooperate with them and keep the relevant information confidential.

Article 227 of the Rules of Criminal Procedure of the People's Procuratorate: After filing a case, the People's Procuratorate may take technical investigation measures after strict approval procedures and submit them to the relevant authorities for implementation.

Several Provisions on Handling Economic Crime Cases by Public Security Organs Article 37 Where a public security organ needs to take technical investigation measures in handling economic crime cases, it shall strictly follow the scope and procedures stipulated in relevant laws, regulations and normative documents.