In Murder at the National Gallery, Margaret Truman examines the character flaws that can make a relatively mild-mannered, relatively good man, Luther Mason, turn to crime. We get to meet his cold mother, his ambitious ex-wife, his controlling girlfriend, his spoiled son, and also the delightful Annabel Reed-Smith, commissioned by the Vice-President’s wife to work with Luther on the National Gallery’s prestigious exhibit of the tempestuous Italian painter Carivaggio’s work.