Wang Zhidong, legal adviser to the family of visiting Chinese scholar Zhang Yingying, speaks to the press near the federal courthouse building in Peoria, Illinois, the United States, on June 24, 2019. Brendt Christensen, a former doctoral student of the University of Illinois at Urbana-Champaign (UIUC), on Monday was ruled guilty of kidnapping and killing Zhang Yingying, a visiting Chinese scholar at UIUC, in 2017. (Xinhua/Wang Ping)