A Knoxville house fire killed a 77-year-old woman and injured her husband. Marion County Sheriff Jason Sandholdt says around 11 p.m. Sunday dispatchers received a call about a Knoxville house engulfed in flames with a woman inside. Emergency responders took Patricia Henning to a nearby hospital, where she later died. Her husband, 79-year-old Ronald Henning, was injured and taken to a burn unit at the University of Iowa Hospitals and Clinics.