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)
"I met Nihoul in a restaurant in Brussels. 'I am the Monster of Belgium,' he roared at me by way of greeting. He is confident he will never come to trial and that the evidence against him will never be heard by any jury. During the course of our meal he, apparently playfully, grabbed me, tickling, and finally pulled me over on to him in the restaurant booth until I had to appeal to my colleagues for rescue." (May 5, 2002, Olenka Frenkiel for The Guardian, 'Belgium's silent heart of darkness')
"[Guy] Collignon explained to me that the investigation [into the murder of Christine] was evolving towards important, high level people. He said it would be better to leave those people alone, that he would soon be promoted and that he would probably not be involved anymore in the investigation." (P.V. 100.450, January 19, 1997, quote of Michel Van Hees, the brother of Christine) (Note: Guy Collignon was a visitor of Les Atrebates, which was the predecessor of the Dolo, which he also would visit.