Consider genre fiction relating to the jury system—both from the era in which 12 Angry Men was written (for example, Mickey Spillane's I, the Jury) or more recent work (for example, Scott Turow's Presumed Innocent or works by John Grisham).
Consider Lawrence and Lee's 1955 play Inherit the Wind, which dramatizes a jury trial resonant in the era's culture wars from the perspective of attorneys.
Consider Miller's The Crucible, another play from the same era, which examines the question of accusation and the presumption of guilt and was also inspired by the injustices done during the McCarthy era.