The father of jailed Chinese human rights lawyer Jiang Tianyong has been called in and issued with a warning by the country's state security police after the family issued a statement slamming the government's forced "appointment" of defense lawyers in the case. "The state security police took Jiang Tianyong's father down to the police station on 16 June 2017 for a chat, and they told him not to have anything to do with anyone outside[the case], because it is still under investigation," Jiang's U.S.-based wife Jin Bianling told RFA on Friday. The warning came after the family issued a joint statement on Thursday hitting out at the authorities for refusing to recognize defense lawyers they appointed by refusing their requests to meet with Jiang, who has had no contact with family or lawyers since his incarceration. "It seems the authorities are up to their old tricks and are forcing Jiang Tianyong to accept government-appointed lawyers," the statement, posted on the website of the U.S.-based Human Rights in China, said. "Hearing this news, we are beside ourselves with anger," said the statement, signed by Jiang's mother, father and wife. It said the authorities appear to be taking the same approach with all lawyers detained in a nationwide operation since July 2015, including Wang Quanzhang, Li Heping, and Xie Yang. "We absolutely do not recognize or accept government-appointed lawyers," the family said, calling on the government to recognize lawyers Chen Jinxue and Zhang Lei as Jiang's official defense team. "We reserve the right to sue the government units handling the case on account of their unlawful appointment of lawyers," it said. Jin said she had told her father-in-law Jiang Lianghou that the family needs to speak out more, not less, following the warning from state security police. "I told his father that Jiang Tianyong is innocent, and that the more afraid[the authorities] become, the more we have to speak to people outside the case, to tell the whole world that Jiang Tianyong is innocent," she said. Meanwhile, Jiang's mother Wei Ziyun issued a video statement in support of her son, who faces charges of "subversion of state power" after his initial detention last November. "To this day, the lawyers we appointed to defend him have been unable to meet with him," Wei said. "I don't believe that my son would break the law, because he studies the law." "My son is himself a lawyer who has helped many, many people," she said.