2. Even if it really involves state secrets, as your police officer friend said, it can only be because the family does not allow it, and the lawyer can meet at an approved meeting, but it is absolutely impossible to "cannot be found in the detention center" This person” “can’t even find a lawyer”, which is abnormal. Ask the lawyer to go to the Public Security Bureau to explain that if the case involves state secrets, the Public Security Bureau will tell the lawyer that it is a confidential case and the interview will have to wait for approval, but it will not mean that "the person cannot be found."
3. Who told you “the detention center couldn’t find this person”? lawyer? Or did you check it yourself? Try asking the person who first told you or knew the news. Also, it is important to use all your connections in the police to find someone.