CHICAGO – The girlfriend of a 28-year-old man charged in the kidnapping and killing of a University of Illinois scholar from China was so nervous as she secretly recorded him for the FBI before his arrest last year that she fainted at least once in front of him, according to court filings. The revelation came in a flurry of pretrial motions filed Monday by Brendt Christensen’s lawyers in central Illinois, where the university is located and where 26-year-old Yingying Zhang was last seen getting into Christensen’s black Saturn Astra on June 9 last year. One motion asks U.S.