Jean-Marie Pontaut is the editor-in-chief at the Investigation Department of L'Express. He is the author of many different essays, among which especially: L'Homme qui en savait trop (Fayard, 2000), Les oreilles du président (Fayard, 1996), and, together with Jacques Derogy, by Robert Laffont, L'Enquête sur les affaires d'un septennat (1981), L'Enquête sur les mystères de mai (1984), Enquête sur trois secrets d'État (1986).
Marc Epstein is a reporter at L'Express. He has recently received the Quai d'Orsay Prize for his reports in Afghanistan.