THE ARDENNES FILES | In the dense forests of the Ardennes, two of Europe’s most notorious serial killers, Marc Dutroux and Michel Fourniret, operated for years in the same fractured landscape, enabled by the same broken system. Their crimes ran parallel. Their victims vanished into the same silence.
"The Ardennes Files" is the first documentary series to tell this story from the inside.

At the heart of this doc series are over 200 never-before-seen handwritten letters sent directly from both killers to journalist Guy van Gestel - the only reporter who gained their trust. While behind bars, Dutroux and Fourniret poured out their thoughts, justifications, corrections, and chilling observations in more than 150 pages from Fourniret alone. These raw, intimate documents; filled with narcissism, banality, and disturbing clarity - open a door no investigation or trial ever could.
With Guy van Gestel himself as our guide, the series weaves the two massive, interconnected cases into one haunting narrative. Through the killers’ own words, we finally hear how they saw the system, how they exploited it, and how the darkness continued even after one monster was caught. This side of the story has never been told. Until now.