Premise: In "Killing the Dream: James Earl Ray and the Assassination of Martin Luther King, JR.", by Gerald Posner (Harvest/Harcourt Brace, $15), the writer who attacked Kennedy conspiracy theories in "Case Closed" takes on Ray's claim of innocence in the 1968 murder of King.
Hypothesis: Gerald Posner takes on Ray's claim of innocence in the 1968 murder of King.