[3] Although convicted to one-year imprisonment in 1986 for his connection to the bankruptcy of the Boomse Metaalwerken, de Bonvoisin was cleared of this crime in May 2000.
According to Serge Dumont, he was from 1974 on the national treasurer of the "CEPIC", at the time a far right organization within the Parti Social Chrétien.
[4] Walter De Bock mentions him as an important factor in a case of illegal campaign funding for Paul Vanden Boeynants, former Belgian Prime Minister and then Minister of Defence by contractors working for the ministry of defence.
[6] De Bonvoisin is pejoratively nicknamed the "Black Baron," for alleged connections to the Nijvel Gang, CCC and Gladio, and the financing of "fascist and militant groups."
The term was first coined by Albert Raes, former head of the Belgian State Security Service.