Possible Clues:

• Star of the 1946 film It's a Wonderful Life
• Actor with the same initials as Jefferson Smith, his role in 'Mr. Smith Goes To Washington'
• Stevenson's accused murderer seen in rear window
• Actor born 5/20/1908
• 'Rear Window' actor with a drawl
• 35-Across in 1964
• 'Anatomy of a Murder': Defense