Washington Police this week hope to interview a Tennessee man who witnessed a murder in Washington last year. Chief Greg Goodman says William Thomas Lishman is being held by Tennessee authorities as a material witness in a homicide investigation centered on the death of Robert Thomas Blankenship. Goodman says they will either set up some sort of electronic interview, or send an officer to Tennessee. Blankenship was found unconscious outside the 4th Avenue Bar and Grill in November. He was later pronounced dead at the University of Iowa Hospitals and Clinics.