Nathan Freudenthal Leopold, Jr. (November 19, 1904 – August 29, 1971) and Richard Albert Loeb (; June 11, 1905 – January 28, 1936), usually referred to collectively as Leopold and Loeb, were two wealthy students at the University of Chicago who in May 1924 kidnapped and murdered 14-year-old Robert Franks in Chicago. They committed the murder—widely characterized at the time as "the crime of the century"—as a demonstration of their perceived intellectual superiority, which, they thought, rendered them capable of carrying out a "perfect crime", and absolved them of responsibility for their actions.