Donald P. Thornhill, 64, was found dead inside his Cochise Way home in Pleasure Ridge Park, Louisville, Kentucky on April 25, 2011. The coroner ruled his death a homicide caused by sharp force injuries. Thornhill had lived in Louisville, worked as a cook, and had been disabled for several years before his killing.

Louisville Metro Police opened a homicide investigation and canvassed the neighborhood, but found no signs of forced entry and uncovered little physical evidence or witnesses. Detectives were unable to identify suspects or motives, and the case has remained unsolved and classified as a cold case among 2011 homicides.

Anyone who knew Thornhill, saw anything near Cochise Way on April 25, 2011, or has information that could help the investigation is asked to come forward.