A forensic psychology expert is raising new questions about the disappearance of Nancy Guthrie, suggesting her abduction may have been driven by a possible act of revenge, Wonderwall.com can reveal. The 84-year-old vanished from her Tucson, Arizona, home on February 1, and investigators have yet to determine what happened, where she is now or if she is even still alive. 'Something Went Very Wrong' Forensic expert Ann Burgess suggests the case may involve a possible 'revenge' motive.