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.
"Marc had accurately sensed that he would benefit from continuing to see Nihoul, because of his connections and those of his wife, the lawyer[Annie Bouty]." (PV 2739, October 9, 1996, testimony of Michelle Martin, ex-wife of Marc Dutroux)
"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')