Leopold and Loeb exhibition.

Northwestern University's online exhibition "The Murder That Wouldn't Die: Leopold & Loeb in Artifact, Fact, and Fiction" examines the 1924 murder of young Bobby Franks through items such as ransom notes, confessions and psychological evaluations of Leopold and Loeb, court transcripts, trial photos, and fictional versions of the case such as Meyer Levin's Compulsion and Alfred Hitchcock's Rope.

Nathan Leopold (top) and
Richard Loeb in 1924.

Erle Stanley Gardner's correspondence with Nathan Leopold.

On the blog American Fiction Notes, Mark Athitakis discusses the correspondence of author-lawyer Erle Stanley Gardner with convicted murderer Nathan Leopold (of Leopold and Loeb infamy). A few more details can be gleaned here from UT-Austin's Ransom Center; other mystery writers mentioned on this page include Rupert Croft-Cooke (aka Leo Bruce) and Beverley Nichols.

(Hat tip to the Guardian books blog)