"Project Runway" mentor Tim Gunn discusses the life and legacy of famed fashion designer Gianni Versace, whose life was cut short by spree killer Andrew Cunanan 20 years ago this July. Correspondent Richard Schlesinger investigates the trail that led to Versace's death in an all-new "48 Hours" airing Saturday, Dec. 30 at 9 p.m. ET/PT on CBS.
