Legal analysis: not filing a case, but asking. In order to find out the facts of criminal cases, the public security organs inform witnesses to go to the relevant public security departments for interrogation, which is in line with the law. The witness shall, in accordance with the requirements of the inquiry notice, go to the police station on time to accept the inquiry and assist the public security organ in solving the case as soon as possible. If the witness is unwilling to go to the police station for some reason, he may state the reasons in the defense and ask the public security organ to go to the unit, residence or place proposed by the witness. Under normal circumstances, the public security organ will agree. If the witness does not go, the public security organ will find the witness's home or his unit to ask. Because the law of our country stipulates that witnesses have the obligation to testify, when the public security organs come to ask questions, the witnesses will still be asked.
Legal basis: Article 122 of the Criminal Procedure Law of People's Republic of China (PRC), investigators may question witnesses on the spot or at the unit, residence or place proposed by the witness. When necessary, the witness may be notified to testify in a people's procuratorate or a public security organ. When questioning witnesses on the spot, they should show their work certificates, and when questioning witnesses at their units, residences or places proposed by witnesses, they should show their certificates from people's procuratorates or public security organs.