Legal analysis: 1. If your family works in other places, please call the local public security bureau first. 2. Give proof that it is your family, such as a household registration book, and it is best to bring a photo of the person you are looking for; 3. The specific place where the family members work, and tell them the time of the recent call.
Legal basis: Article 109 of the Criminal Procedure Law of People's Republic of China (PRC). When a public security organ or a people's procuratorate discovers a criminal fact or a criminal suspect, it shall file a case for investigation within its jurisdiction.