He worked for the police/government as a paid 'informer'. [='informant']
(..) with Dassault, Lagardere, Bouygues... I'm sure he'll run in , even against Chirac! Not with this network of bribery and money-laundering. One of my informers hacked into the Clearstream Bank. He gave me an initial list of people. Secret accounts receiving bribes. What we have here is (..)2016 Me Before You