Michèle 'Mimi' Marchand, a powerful figure in the French gossip press and an influential PR fixer to politicians, has already been placed under investigation over the retraction of evidence by businessman Ziad Takieddine, a key witness in the probe into Libyan funding of Nicolas Sarkozy's 2007 election campaign. Now Marchand, 74, the boss of paparazzi agency Bestimage, has been placed under investigation in relation to a second case, involving allegations of police leaks. It concerns the publication of photos of the arrest of a man over a sex tape affair that ended the hopes of former government spokesperson Benjamin Griveaux of becoming mayor of Paris for Emmanuel Macron's party. Marchand, who denies any wrongdoing, is also being investigated for alleged “extortion” against well-known French television presenter Karine Le Marchand. Fabrice Arfi and Antton Rouget report.