Can lawyers use technical investigation at will? Which department can use technical investigation?

First, lawyers have no right to use technical investigation means. Technical investigation measures refer to a specific technical means adopted by investigation organs after strict examination and approval in order to investigate specific criminal acts in accordance with relevant state regulations. Technical investigation behavior is the investigation behavior using technical investigation measures. It usually includes electronic monitoring, telephone monitoring, electronic monitoring, secret photography, video recording, mail inspection and other secret technical means.

Two, the main body can exercise technical investigation measures are public security organs and state security organs.

Article 148 of China's Criminal Procedure Law stipulates that public security organs can take technical investigation measures against crimes endangering national security, terrorist activities, organized crimes of underworld nature, major drug crimes or other crimes seriously endangering society after strict approval procedures according to the needs of investigating crimes. After filing a case, the people's procuratorate may, according to the needs of investigating crimes and through strict approval procedures, take technical investigation measures and hand them over to the relevant authorities for execution in accordance with regulations. To hunt down a criminal suspect or defendant who is wanted at large or whose arrest has been approved, the necessary technical investigation measures may be taken upon approval.