On the morning of Tuesday, November 20, 1979, 55-year-old Kenneth Holzberg was shot and killed during a robbery at his place of business in Denver, Colorado. Holzberg, a jeweler and coin dealer, was working at the Villa Monaco Jewels Jewelry Store near East Iliff Avenue and South Monaco Parkway when an armed man entered. A struggle between Holzberg and the intruder ended when a shot was fired; Holzberg was treated but died that day of his injuries.

The killing is classified as a homicide. No arrest has been announced and the person responsible has not been identified; the case remains an open cold case with the Denver Police Department. If anyone has information about that morning or remembers suspicious activity near East Iliff Avenue and South Monaco Parkway in November 1979, please contact investigators.