Concerns have been raised privately within the French justice system about the involvement of the government and in particular the Élysée in picking the successor to Éliane Houlette as head of the country's national financial crimes prosecution unit, the Parquet National Financier (PNF). This is because the PNF is currently handling two investigations which are particularly sensitive for the presidency. One is into the Russian security contracts involving former Élysée security aide Alexandre Benalla. The other probe is into President Emmanuel Macron's chief of staff Alexis Kohler over an alleged conflict of interest. Fabrice Arfi, Michel Deléan and Antton Rouget report.