Son of Congo-Brazzaville president accused of siphoning off $50m

Denis Christel Sassou-Nguesso allegedly used money-laundering scheme spanning six European countries

The son of Congo-Brazzaville's president has misappropriated $50m (41m) of public money by routing it through shell companies and secrecy jurisdictions, according to a new investigation.

Six countries in the EU, the US state of Delaware and the British Virgin Islands all played a key role in Denis Christel Sassou-Nguesso's scheme, according to Global Witness. The campaign group said the money was siphoned off through an apparent sham contract Congo-Brazzaville had with a Brazilian infrastructure company.