Gaston Calmette was the editor of Figaro. Mme Caillaux killed him for threatening to publish love letters. Her trial had a massive impact on French public life, even causing riots between left and right wing street gangs.
Editors. "Mme Caillaux assassinates Gaston Calmette". The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=12176, accessed 26 November 2015.]