Richard Loeb

along with Nathan Leopold, murdered 14-years-old Robert "Bobby" Franks in 1924 and were sentenced to life imprisonment.  The duo were motivated to murder Franks by their desire to commit a perfect crime. Once apprehended, Leopold and Loeb retained Clarence Darrow as counsel for the defense. Darrow’s summation in their trial is noted for its influential criticism of capital punishment and retributive, as opposed to rehabilitative, penal systems.  Leopold and Loeb have been the inspiration for several works in film, theater, and fiction, such as the 1929 play Rope by Patrick Hamilton and Alfred Hitchcock's 1948 film of the same name. - Wikipedia