Robert Cosgrove Greenlease Jr. (February 3, 1947 – September 28, 1953) was a six-year-old from Kansas City, Missouri, United States, who was the victim of a kidnapping and homicide on September 28, 1953. His father, Robert Cosgrove Greenlease Sr., was a multi-millionaire auto dealer, and the demanded ransom payment was the largest in American history at the time.