Le Baron Noir (the Black Baron) is a very suiting name for a Belgian man of nobility that funded, supported and fomented a fascist underground, which was involved in all kinds of suspicious and criminal activities during the Cold War. It is even more fitting for a Belgian man of nobility that has been directly accused of the abuse and in one case of murder of children by no less than five victim-witnesses. That man is Benoit de Bonvoisin.
X1 apparently witnessed Carine "Clo" Dellaert's murder, at which she saw similar people involved in murders of other girls. The life of Carine is briefly examined and X1's testimony is determined to have been credible.
“You don’t believe that they [Haemers gang] did these robberies with the four or five of them? To pull off something like that you need an army of accomplices! Well-placed accomplices." (December 1993, quote of Etienne Delhuvenne)