---
category: Belgium Scandals
summary: Katrien de Cuyper was a Belgian girl whose 1991 disappearance was linked
  to the Marc Dutroux network through testimony in the X-Dossier.
tags:
- Person
- Belgium
- Dutroux
---

Katrien de Cuyper was a Belgian girl whose 1991 disappearance was linked to the [Marc Dutroux](/people/marc-dutroux/) network through testimony in the [X-Dossier](/events/x-dossier/). X1 ([Regina Louf](/people/regina-louf/)) described witnessing de Cuyper's murder at a castle, providing details that matched aspects of the case. Members of the [Morkhoven Workgroup](/organizations/morkhoven-workgroup/) believed they had identified de Cuyper in pornographic photos found on the [Apollo Disks](/concepts/apollo-disks/) seized from [Gerrit-Jan Ulrich](/people/gerrit-jan-ulrich/)'s apartment in Zandvoort.[^1]

[^1]: Dovey, S. (2023). *Eye of the Chickenhawk*. United States: Thehotstar.