Two headline-grabbing real-life crimes are examined tonight in prime time. One is this American Experience documentary, recalling the infamous 1924 case in which two University of Chicago students, Nathan Leopold Jr. and Richard Loeb, killed someone just for the thrill of committing the “perfect crime.” (Spoiler Alert: Had they succeeded, this documentary wouldn’t exist.) Check local listings. For the full story, see David Hinckley's All Along the Watchtower.